345717823 has 4 divisors (see below), whose sum is σ = 377146728. Its totient is φ = 314288920.

The previous prime is 345717817. The next prime is 345717829. The reversal of 345717823 is 328717543.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (345717817) and next prime (345717829).

It is not a de Polignac number, because 345717823 - 2²⁵ = 312163391 is a prime.

It is a Smith number, since the sum of its digits (40) 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 (345717829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15714436 + ... + 15714457.

It is an arithmetic number, because the mean of its divisors is an integer number (94286682).

Almost surely, 2^345717823 is an apocalyptic number.

345717823 is a deficient number, since it is larger than the sum of its proper divisors (31428905).

345717823 is a wasteful number, since it uses less digits than its factorization.

345717823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31428904.

The product of its digits is 141120, while the sum is 40.

The square root of 345717823 is about 18593.4887258954. The cubic root of 345717823 is about 701.8439973096.

The spelling of 345717823 in words is "three hundred forty-five million, seven hundred seventeen thousand, eight hundred twenty-three".