87745297 has 2 divisors, whose sum is σ = 87745298. Its totient is φ = 87745296.

The previous prime is 87745223. The next prime is 87745303. The reversal of 87745297 is 79254778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83010321 + 4734976 = 9111^2 + 2176^2 .

It is a cyclic number.

It is not a de Polignac number, because 87745297 - 2⁷ = 87745169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87745297.

It is not a weakly prime, because it can be changed into another prime (87743297) 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, 43872648 + 43872649.

It is an arithmetic number, because the mean of its divisors is an integer number (43872649).

Almost surely, 2^87745297 is an apocalyptic number.

It is an amenable number.

87745297 is a deficient number, since it is larger than the sum of its proper divisors (1).

87745297 is an equidigital number, since it uses as much as digits as its factorization.

87745297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 49.

The square root of 87745297 is about 9367.2459666649. The cubic root of 87745297 is about 444.3664713050.

The spelling of 87745297 in words is "eighty-seven million, seven hundred forty-five thousand, two hundred ninety-seven".