86915869 has 2 divisors, whose sum is σ = 86915870. Its totient is φ = 86915868.

The previous prime is 86915863. The next prime is 86915893. The reversal of 86915869 is 96851968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 3193369 = 9150^2 + 1787^2 .

It is a cyclic number.

It is not a de Polignac number, because 86915869 - 2¹¹ = 86913821 is a prime.

It is a super-2 number, since 2×86915869² = 15108736568050322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86915863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43457934 + 43457935.

It is an arithmetic number, because the mean of its divisors is an integer number (43457935).

Almost surely, 2^86915869 is an apocalyptic number.

It is an amenable number.

86915869 is a deficient number, since it is larger than the sum of its proper divisors (1).

86915869 is an equidigital number, since it uses as much as digits as its factorization.

86915869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 86915869 is about 9322.8680672849. The cubic root of 86915869 is about 442.9618852739.

The spelling of 86915869 in words is "eighty-six million, nine hundred fifteen thousand, eight hundred sixty-nine".