86509899 has 12 divisors (see below), whose sum is σ = 142810096. Its totient is φ = 49434192.

The previous prime is 86509897. The next prime is 86509901. The reversal of 86509899 is 99890568.

It is an interprime number because it is at equal distance from previous prime (86509897) and next prime (86509901).

It is not a de Polignac number, because 86509899 - 2¹ = 86509897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86509897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 686524 + ... + 686649.

Almost surely, 2^86509899 is an apocalyptic number.

86509899 is a deficient number, since it is larger than the sum of its proper divisors (56300197).

86509899 is a wasteful number, since it uses less digits than its factorization.

86509899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373186 (or 1373183 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 86509899 is about 9301.0697771815. The cubic root of 86509899 is about 442.2711408721.

The spelling of 86509899 in words is "eighty-six million, five hundred nine thousand, eight hundred ninety-nine".