291940623311 has 2 divisors, whose sum is σ = 291940623312. Its totient is φ = 291940623310.

The previous prime is 291940623301. The next prime is 291940623319. The reversal of 291940623311 is 113326049192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 291940623311 - 2²² = 291936429007 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291940623319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145970311655 + 145970311656.

It is an arithmetic number, because the mean of its divisors is an integer number (145970311656).

Almost surely, 2^291940623311 is an apocalyptic number.

291940623311 is a deficient number, since it is larger than the sum of its proper divisors (1).

291940623311 is an equidigital number, since it uses as much as digits as its factorization.

291940623311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 291940623311 in words is "two hundred ninety-one billion, nine hundred forty million, six hundred twenty-three thousand, three hundred eleven".