391230865079 has 4 divisors (see below), whose sum is σ = 397644485880. Its totient is φ = 384817244280.

The previous prime is 391230865009. The next prime is 391230865093. The reversal of 391230865079 is 970568032193.

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

It is a cyclic number.

It is not a de Polignac number, because 391230865079 - 2²⁴ = 391214087863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 391230865079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391230865009) 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, 3206810309 + ... + 3206810430.

It is an arithmetic number, because the mean of its divisors is an integer number (99411121470).

Almost surely, 2^391230865079 is an apocalyptic number.

391230865079 is a deficient number, since it is larger than the sum of its proper divisors (6413620801).

391230865079 is an equidigital number, since it uses as much as digits as its factorization.

391230865079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6413620800.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 391230865079 in words is "three hundred ninety-one billion, two hundred thirty million, eight hundred sixty-five thousand, seventy-nine".