345965639 has 4 divisors (see below), whose sum is σ = 346076856. Its totient is φ = 345854424.

The previous prime is 345965617. The next prime is 345965647. The reversal of 345965639 is 936569543.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345965639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345965539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50804 + ... + 57209.

It is an arithmetic number, because the mean of its divisors is an integer number (86519214).

Almost surely, 2^345965639 is an apocalyptic number.

345965639 is a deficient number, since it is larger than the sum of its proper divisors (111217).

345965639 is a wasteful number, since it uses less digits than its factorization.

345965639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111216.

The product of its digits is 2624400, while the sum is 50.

The square root of 345965639 is about 18600.1515854038. The cubic root of 345965639 is about 702.0116548796.

The spelling of 345965639 in words is "three hundred forty-five million, nine hundred sixty-five thousand, six hundred thirty-nine".