86408969 has 4 divisors (see below), whose sum is σ = 86440260. Its totient is φ = 86377680.

The previous prime is 86408963. The next prime is 86408989. The reversal of 86408969 is 96980468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40005625 + 46403344 = 6325^2 + 6812^2 .

It is a cyclic number.

It is not a de Polignac number, because 86408969 - 2²⁴ = 69631753 is a prime.

It is a super-2 number, since 2×86408969² = 14933019847285922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86408963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11054 + ... + 17175.

It is an arithmetic number, because the mean of its divisors is an integer number (21610065).

Almost surely, 2^86408969 is an apocalyptic number.

It is an amenable number.

86408969 is a deficient number, since it is larger than the sum of its proper divisors (31291).

86408969 is a wasteful number, since it uses less digits than its factorization.

86408969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31290.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 86408969 is about 9295.6424737616. The cubic root of 86408969 is about 442.0990765661.

The spelling of 86408969 in words is "eighty-six million, four hundred eight thousand, nine hundred sixty-nine".