345816421387 has 4 divisors (see below), whose sum is σ = 345897054360. Its totient is φ = 345735788416.

The previous prime is 345816421381. The next prime is 345816421399. The reversal of 345816421387 is 783124618543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783124618543 = 1223 ⋅640330841.

It is a cyclic number.

It is not a de Polignac number, because 345816421387 - 2¹⁹ = 345815897099 is a prime.

It is a super-2 number, since 2×345816421387² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345816421381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40310053 + ... + 40318630.

It is an arithmetic number, because the mean of its divisors is an integer number (86474263590).

Almost surely, 2^345816421387 is an apocalyptic number.

345816421387 is a deficient number, since it is larger than the sum of its proper divisors (80632973).

345816421387 is an equidigital number, since it uses as much as digits as its factorization.

345816421387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80632972.

The product of its digits is 3870720, while the sum is 52.

The spelling of 345816421387 in words is "three hundred forty-five billion, eight hundred sixteen million, four hundred twenty-one thousand, three hundred eighty-seven".