391902312344201 has 4 divisors (see below), whose sum is σ = 408941543315712. Its totient is φ = 374863081372692.

The previous prime is 391902312344149. The next prime is 391902312344281. The reversal of 391902312344201 is 102443213209193.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 391902312344201 - 2²⁶ = 391902245235337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391902312344281) 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, 8519615485721 + ... + 8519615485766.

It is an arithmetic number, because the mean of its divisors is an integer number (102235385828928).

Almost surely, 2^{391902312344201} is an apocalyptic number.

It is an amenable number.

391902312344201 is a deficient number, since it is larger than the sum of its proper divisors (17039230971511).

391902312344201 is a wasteful number, since it uses less digits than its factorization.

391902312344201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17039230971510.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 391902312344201 in words is "three hundred ninety-one trillion, nine hundred two billion, three hundred twelve million, three hundred forty-four thousand, two hundred one".