87660571 has 2 divisors, whose sum is σ = 87660572. Its totient is φ = 87660570.

The previous prime is 87660563. The next prime is 87660577. The reversal of 87660571 is 17506678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87660571 - 2³ = 87660563 is a prime.

It is not a weakly prime, because it can be changed into another prime (87660577) 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, 43830285 + 43830286.

It is an arithmetic number, because the mean of its divisors is an integer number (43830286).

Almost surely, 2^87660571 is an apocalyptic number.

87660571 is a deficient number, since it is larger than the sum of its proper divisors (1).

87660571 is an equidigital number, since it uses as much as digits as its factorization.

87660571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 87660571 is about 9362.7224139136. The cubic root of 87660571 is about 444.2233999405.

The spelling of 87660571 in words is "eighty-seven million, six hundred sixty thousand, five hundred seventy-one".