345188421373 has 4 divisors (see below), whose sum is σ = 345189597948. Its totient is φ = 345187244800.

The previous prime is 345188421367. The next prime is 345188421379. The reversal of 345188421373 is 373124881543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 373124881543 = 241 ⋅1548236023.

It is an interprime number because it is at equal distance from previous prime (345188421367) and next prime (345188421379).

It can be written as a sum of positive squares in 2 ways, for example, as 102314897689 + 242873523684 = 319867^2 + 492822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345188421373 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345188421379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249315 + ... + 867487.

It is an arithmetic number, because the mean of its divisors is an integer number (86297399487).

Almost surely, 2^345188421373 is an apocalyptic number.

It is an amenable number.

345188421373 is a deficient number, since it is larger than the sum of its proper divisors (1176575).

345188421373 is an equidigital number, since it uses as much as digits as its factorization.

345188421373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176574.

The product of its digits is 1935360, while the sum is 49.

The spelling of 345188421373 in words is "three hundred forty-five billion, one hundred eighty-eight million, four hundred twenty-one thousand, three hundred seventy-three".