86512969 has 2 divisors, whose sum is σ = 86512970. Its totient is φ = 86512968.

The previous prime is 86512963. The next prime is 86512991. The reversal of 86512969 is 96921568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46063369 + 40449600 = 6787^2 + 6360^2 .

It is a cyclic number.

It is not a de Polignac number, because 86512969 - 2³ = 86512961 is a prime.

It is a super-2 number, since 2×86512969² = 14968987610389922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (86512961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43256484 + 43256485.

It is an arithmetic number, because the mean of its divisors is an integer number (43256485).

Almost surely, 2^86512969 is an apocalyptic number.

It is an amenable number.

86512969 is a deficient number, since it is larger than the sum of its proper divisors (1).

86512969 is an equidigital number, since it uses as much as digits as its factorization.

86512969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 86512969 is about 9301.2348104969. The cubic root of 86512969 is about 442.2763724751.

The spelling of 86512969 in words is "eighty-six million, five hundred twelve thousand, nine hundred sixty-nine".