87880057 has 2 divisors, whose sum is σ = 87880058. Its totient is φ = 87880056.

The previous prime is 87880043. The next prime is 87880127. The reversal of 87880057 is 75008878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86192656 + 1687401 = 9284^2 + 1299^2 .

It is a cyclic number.

It is not a de Polignac number, because 87880057 - 2⁷ = 87879929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87879995 and 87880022.

It is not a weakly prime, because it can be changed into another prime (87880007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43940028 + 43940029.

It is an arithmetic number, because the mean of its divisors is an integer number (43940029).

Almost surely, 2^87880057 is an apocalyptic number.

It is an amenable number.

87880057 is a deficient number, since it is larger than the sum of its proper divisors (1).

87880057 is an equidigital number, since it uses as much as digits as its factorization.

87880057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125440, while the sum is 43.

The square root of 87880057 is about 9374.4363563896. The cubic root of 87880057 is about 444.5938422588.

The spelling of 87880057 in words is "eighty-seven million, eight hundred eighty thousand, fifty-seven".