87596521 has 2 divisors, whose sum is σ = 87596522. Its totient is φ = 87596520.

The previous prime is 87596519. The next prime is 87596527. The reversal of 87596521 is 12569578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73616400 + 13980121 = 8580^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 87596521 - 2¹ = 87596519 is a prime.

Together with 87596519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87596527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43798260 + 43798261.

It is an arithmetic number, because the mean of its divisors is an integer number (43798261).

Almost surely, 2^87596521 is an apocalyptic number.

It is an amenable number.

87596521 is a deficient number, since it is larger than the sum of its proper divisors (1).

87596521 is an equidigital number, since it uses as much as digits as its factorization.

87596521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 87596521 is about 9359.3013093927. The cubic root of 87596521 is about 444.1151816125.

The spelling of 87596521 in words is "eighty-seven million, five hundred ninety-six thousand, five hundred twenty-one".