87616537 has 2 divisors, whose sum is σ = 87616538. Its totient is φ = 87616536.

The previous prime is 87616531. The next prime is 87616559. The reversal of 87616537 is 73561678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75672601 + 11943936 = 8699^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 87616537 - 2⁷ = 87616409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87616493 and 87616502.

It is not a weakly prime, because it can be changed into another prime (87616531) 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, 43808268 + 43808269.

It is an arithmetic number, because the mean of its divisors is an integer number (43808269).

Almost surely, 2^87616537 is an apocalyptic number.

It is an amenable number.

87616537 is a deficient number, since it is larger than the sum of its proper divisors (1).

87616537 is an equidigital number, since it uses as much as digits as its factorization.

87616537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 87616537 is about 9360.3705589042. The cubic root of 87616537 is about 444.1490061388.

The spelling of 87616537 in words is "eighty-seven million, six hundred sixteen thousand, five hundred thirty-seven".