291860113 has 2 divisors, whose sum is σ = 291860114. Its totient is φ = 291860112.

The previous prime is 291860111. The next prime is 291860117. The reversal of 291860113 is 311068192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239847169 + 52012944 = 15487^2 + 7212^2 .

It is a cyclic number.

It is not a de Polignac number, because 291860113 - 2¹ = 291860111 is a prime.

Together with 291860111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (291860111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145930056 + 145930057.

It is an arithmetic number, because the mean of its divisors is an integer number (145930057).

Almost surely, 2^291860113 is an apocalyptic number.

It is an amenable number.

291860113 is a deficient number, since it is larger than the sum of its proper divisors (1).

291860113 is an equidigital number, since it uses as much as digits as its factorization.

291860113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 291860113 is about 17083.9138665588. The cubic root of 291860113 is about 663.3227849191.

The spelling of 291860113 in words is "two hundred ninety-one million, eight hundred sixty thousand, one hundred thirteen".