87660577 has 2 divisors, whose sum is σ = 87660578. Its totient is φ = 87660576.

The previous prime is 87660571. The next prime is 87660581. The reversal of 87660577 is 77506678.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87590881 + 69696 = 9359^2 + 264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87660577 is a prime.

It is not a weakly prime, because it can be changed into another prime (87660571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43830288 + 43830289.

It is an arithmetic number, because the mean of its divisors is an integer number (43830289).

Almost surely, 2^87660577 is an apocalyptic number.

It is an amenable number.

87660577 is a deficient number, since it is larger than the sum of its proper divisors (1).

87660577 is an equidigital number, since it uses as much as digits as its factorization.

87660577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 87660577 is about 9362.7227343332. The cubic root of 87660577 is about 444.2234100756.

The spelling of 87660577 in words is "eighty-seven million, six hundred sixty thousand, five hundred seventy-seven".