87416531 has 2 divisors, whose sum is σ = 87416532. Its totient is φ = 87416530.

The previous prime is 87416507. The next prime is 87416543. The reversal of 87416531 is 13561478.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87416531 - 2¹⁴ = 87400147 is a prime.

It is a super-2 number, since 2×87416531² = 15283299784147922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87416491 and 87416500.

It is not a weakly prime, because it can be changed into another prime (87416561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43708265 + 43708266.

It is an arithmetic number, because the mean of its divisors is an integer number (43708266).

Almost surely, 2^87416531 is an apocalyptic number.

87416531 is a deficient number, since it is larger than the sum of its proper divisors (1).

87416531 is an equidigital number, since it uses as much as digits as its factorization.

87416531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 87416531 is about 9349.6807966903. The cubic root of 87416531 is about 443.8107893709.

The spelling of 87416531 in words is "eighty-seven million, four hundred sixteen thousand, five hundred thirty-one".