86553809 has 4 divisors (see below), whose sum is σ = 86613504. Its totient is φ = 86494116.

The previous prime is 86553799. The next prime is 86553821. The reversal of 86553809 is 90835568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86553809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86553809.

It is not an unprimeable number, because it can be changed into a prime (86555809) 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, 27617 + ... + 30590.

It is an arithmetic number, because the mean of its divisors is an integer number (21653376).

Almost surely, 2^86553809 is an apocalyptic number.

It is an amenable number.

86553809 is a deficient number, since it is larger than the sum of its proper divisors (59695).

86553809 is a wasteful number, since it uses less digits than its factorization.

86553809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59694.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 86553809 is about 9303.4299588915. The cubic root of 86553809 is about 442.3459563605.

The spelling of 86553809 in words is "eighty-six million, five hundred fifty-three thousand, eight hundred nine".