87056969 has 2 divisors, whose sum is σ = 87056970. Its totient is φ = 87056968.

The previous prime is 87056929. The next prime is 87056987. The reversal of 87056969 is 96965078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60637369 + 26419600 = 7787^2 + 5140^2 .

It is a cyclic number.

It is not a de Polignac number, because 87056969 - 2⁸ = 87056713 is a prime.

It is a super-2 number, since 2×87056969² = 15157831702933922, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (87056929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43528484 + 43528485.

It is an arithmetic number, because the mean of its divisors is an integer number (43528485).

Almost surely, 2^87056969 is an apocalyptic number.

It is an amenable number.

87056969 is a deficient number, since it is larger than the sum of its proper divisors (1).

87056969 is an equidigital number, since it uses as much as digits as its factorization.

87056969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 87056969 is about 9330.4324122733. The cubic root of 87056969 is about 443.2014584426.

The spelling of 87056969 in words is "eighty-seven million, fifty-six thousand, nine hundred sixty-nine".