291864113 has 2 divisors, whose sum is σ = 291864114. Its totient is φ = 291864112.

The previous prime is 291864061. The next prime is 291864121. The reversal of 291864113 is 311468192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204404209 + 87459904 = 14297^2 + 9352^2 .

It is a cyclic number.

It is not a de Polignac number, because 291864113 - 2⁸ = 291863857 is a prime.

It is not a weakly prime, because it can be changed into another prime (291864913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145932056 + 145932057.

It is an arithmetic number, because the mean of its divisors is an integer number (145932057).

Almost surely, 2^291864113 is an apocalyptic number.

It is an amenable number.

291864113 is a deficient number, since it is larger than the sum of its proper divisors (1).

291864113 is an equidigital number, since it uses as much as digits as its factorization.

291864113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 291864113 is about 17084.0309353501. The cubic root of 291864113 is about 663.3258152281.

The spelling of 291864113 in words is "two hundred ninety-one million, eight hundred sixty-four thousand, one hundred thirteen".