87580681 has 2 divisors, whose sum is σ = 87580682. Its totient is φ = 87580680.

The previous prime is 87580679. The next prime is 87580697. The reversal of 87580681 is 18608578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69806025 + 17774656 = 8355^2 + 4216^2 .

It is a cyclic number.

It is not a de Polignac number, because 87580681 - 2¹ = 87580679 is a prime.

It is a super-2 number, since 2×87580681² = 15340751368847522, which contains 22 as substring.

Together with 87580679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87580601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43790340 + 43790341.

It is an arithmetic number, because the mean of its divisors is an integer number (43790341).

Almost surely, 2^87580681 is an apocalyptic number.

It is an amenable number.

87580681 is a deficient number, since it is larger than the sum of its proper divisors (1).

87580681 is an equidigital number, since it uses as much as digits as its factorization.

87580681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 87580681 is about 9358.4550541208. The cubic root of 87580681 is about 444.0884103493.

The spelling of 87580681 in words is "eighty-seven million, five hundred eighty thousand, six hundred eighty-one".