87568961 has 2 divisors, whose sum is σ = 87568962. Its totient is φ = 87568960.

The previous prime is 87568937. The next prime is 87568997. The reversal of 87568961 is 16986578.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87534736 + 34225 = 9356^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 87568961 - 2²² = 83374657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87568861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43784480 + 43784481.

It is an arithmetic number, because the mean of its divisors is an integer number (43784481).

Almost surely, 2^87568961 is an apocalyptic number.

It is an amenable number.

87568961 is a deficient number, since it is larger than the sum of its proper divisors (1).

87568961 is an equidigital number, since it uses as much as digits as its factorization.

87568961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 87568961 is about 9357.8288614400. The cubic root of 87568961 is about 444.0686002409.

The spelling of 87568961 in words is "eighty-seven million, five hundred sixty-eight thousand, nine hundred sixty-one".