87087257 has 2 divisors, whose sum is σ = 87087258. Its totient is φ = 87087256.

The previous prime is 87087229. The next prime is 87087263. The reversal of 87087257 is 75278078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85673536 + 1413721 = 9256^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 87087257 - 2⁸ = 87087001 is a prime.

It is not a weakly prime, because it can be changed into another prime (87087227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43543628 + 43543629.

It is an arithmetic number, because the mean of its divisors is an integer number (43543629).

Almost surely, 2^87087257 is an apocalyptic number.

It is an amenable number.

87087257 is a deficient number, since it is larger than the sum of its proper divisors (1).

87087257 is an equidigital number, since it uses as much as digits as its factorization.

87087257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 219520, while the sum is 44.

The square root of 87087257 is about 9332.0553470283. The cubic root of 87087257 is about 443.2528505730.

The spelling of 87087257 in words is "eighty-seven million, eighty-seven thousand, two hundred fifty-seven".