87708857 has 2 divisors, whose sum is σ = 87708858. Its totient is φ = 87708856.

The previous prime is 87708853. The next prime is 87708871. The reversal of 87708857 is 75880778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82973881 + 4734976 = 9109^2 + 2176^2 .

It is a cyclic number.

It is not a de Polignac number, because 87708857 - 2² = 87708853 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87708853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43854428 + 43854429.

It is an arithmetic number, because the mean of its divisors is an integer number (43854429).

Almost surely, 2^87708857 is an apocalyptic number.

It is an amenable number.

87708857 is a deficient number, since it is larger than the sum of its proper divisors (1).

87708857 is an equidigital number, since it uses as much as digits as its factorization.

87708857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 878080, while the sum is 50.

The square root of 87708857 is about 9365.3006892464. The cubic root of 87708857 is about 444.3049487055.

The spelling of 87708857 in words is "eighty-seven million, seven hundred eight thousand, eight hundred fifty-seven".