291940623313 has 4 divisors (see below), whose sum is σ = 292540091200. Its totient is φ = 291341155428.

The previous prime is 291940623311. The next prime is 291940623319. The reversal of 291940623313 is 313326049192.

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 291940623313 - 2¹ = 291940623311 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 291940623313.

It is not an unprimeable number, because it can be changed into a prime (291940623311) 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, 299733213 + ... + 299734186.

It is an arithmetic number, because the mean of its divisors is an integer number (73135022800).

Almost surely, 2^291940623313 is an apocalyptic number.

It is an amenable number.

291940623313 is a deficient number, since it is larger than the sum of its proper divisors (599467887).

291940623313 is an equidigital number, since it uses as much as digits as its factorization.

291940623313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599467886.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 291940623313 in words is "two hundred ninety-one billion, nine hundred forty million, six hundred twenty-three thousand, three hundred thirteen".