87505057 has 2 divisors, whose sum is σ = 87505058. Its totient is φ = 87505056.

The previous prime is 87505039. The next prime is 87505063. The reversal of 87505057 is 75050578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74028816 + 13476241 = 8604^2 + 3671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87505057 is a prime.

It is not a weakly prime, because it can be changed into another prime (87505007) 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, 43752528 + 43752529.

It is an arithmetic number, because the mean of its divisors is an integer number (43752529).

Almost surely, 2^87505057 is an apocalyptic number.

It is an amenable number.

87505057 is a deficient number, since it is larger than the sum of its proper divisors (1).

87505057 is an equidigital number, since it uses as much as digits as its factorization.

87505057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 87505057 is about 9354.4137710495. The cubic root of 87505057 is about 443.9605533361.

The spelling of 87505057 in words is "eighty-seven million, five hundred five thousand, fifty-seven".