391365996053 has 4 divisors (see below), whose sum is σ = 397999318080. Its totient is φ = 384732674028.

The previous prime is 391365996029. The next prime is 391365996067. The reversal of 391365996053 is 350699563193.

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 391365996053 - 2¹⁰ = 391365995029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 6633321967 = 391365996053 / (3 + 9 + 1 + 3 + 6 + 5 + 9 + 9 + 6 + 0 + 5 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 391365995983 and 391365996001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391365996353) 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, 3316660925 + ... + 3316661042.

It is an arithmetic number, because the mean of its divisors is an integer number (99499829520).

Almost surely, 2^391365996053 is an apocalyptic number.

It is an amenable number.

391365996053 is a deficient number, since it is larger than the sum of its proper divisors (6633322027).

391365996053 is an equidigital number, since it uses as much as digits as its factorization.

391365996053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6633322026.

The product of its (nonzero) digits is 17714700, while the sum is 59.

The spelling of 391365996053 in words is "three hundred ninety-one billion, three hundred sixty-five million, nine hundred ninety-six thousand, fifty-three".