291052897 has 2 divisors, whose sum is σ = 291052898. Its totient is φ = 291052896.

The previous prime is 291052847. The next prime is 291052901. The reversal of 291052897 is 798250192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194993296 + 96059601 = 13964^2 + 9801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-291052897 is a prime.

It is not a weakly prime, because it can be changed into another prime (291052837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145526448 + 145526449.

It is an arithmetic number, because the mean of its divisors is an integer number (145526449).

Almost surely, 2^291052897 is an apocalyptic number.

It is an amenable number.

291052897 is a deficient number, since it is larger than the sum of its proper divisors (1).

291052897 is an equidigital number, since it uses as much as digits as its factorization.

291052897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 291052897 is about 17060.2724773082. The cubic root of 291052897 is about 662.7106889879.

The spelling of 291052897 in words is "two hundred ninety-one million, fifty-two thousand, eight hundred ninety-seven".