86249081 has 2 divisors, whose sum is σ = 86249082. Its totient is φ = 86249080.

The previous prime is 86249077. The next prime is 86249101. The reversal of 86249081 is 18094268.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 32959081 = 7300^2 + 5741^2 .

It is a cyclic number.

It is not a de Polignac number, because 86249081 - 2² = 86249077 is a prime.

It is a super-2 number, since 2×86249081² = 14877807946689122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86249881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43124540 + 43124541.

It is an arithmetic number, because the mean of its divisors is an integer number (43124541).

Almost surely, 2^86249081 is an apocalyptic number.

It is an amenable number.

86249081 is a deficient number, since it is larger than the sum of its proper divisors (1).

86249081 is an equidigital number, since it uses as much as digits as its factorization.

86249081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 86249081 is about 9287.0383330748. The cubic root of 86249081 is about 441.8262268789.

The spelling of 86249081 in words is "eighty-six million, two hundred forty-nine thousand, eighty-one".