1913907057317 has 4 divisors (see below), whose sum is σ = 1940863494816. Its totient is φ = 1886950619820.

The previous prime is 1913907057301. The next prime is 1913907057319. The reversal of 1913907057317 is 7137507093191.

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 1913907057317 - 2⁴ = 1913907057301 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 (1913907057319) 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, 13478218643 + ... + 13478218784.

It is an arithmetic number, because the mean of its divisors is an integer number (485215873704).

Almost surely, 2^{1913907057317} is an apocalyptic number.

It is an amenable number.

1913907057317 is a deficient number, since it is larger than the sum of its proper divisors (26956437499).

1913907057317 is an equidigital number, since it uses as much as digits as its factorization.

1913907057317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26956437498.

The product of its (nonzero) digits is 1250235, while the sum is 53.

The spelling of 1913907057317 in words is "one trillion, nine hundred thirteen billion, nine hundred seven million, fifty-seven thousand, three hundred seventeen".