86806489 has 21 divisors (see below), whose sum is σ = 111076869. Its totient is φ = 67641420.

The previous prime is 86806469. The next prime is 86806493. The reversal of 86806489 is 98460868.

The square root of 86806489 is 9317.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 86806489 - 2⁷ = 86806361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86806409) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 7891494 + ... + 7891504.

Almost surely, 2^86806489 is an apocalyptic number.

86806489 is the 9317-th square number.

86806489 is the 4659-th centered octagonal number.

It is an amenable number.

86806489 is a deficient number, since it is larger than the sum of its proper divisors (24270380).

86806489 is an frugal number, since it uses more digits than its factorization.

86806489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The cubic root of 86806489 is about 442.7759909128.

Multiplying 86806489 by its sum of digits (49), we get a square (4253517961 = 65219²).

86806489 divided by its sum of digits (49) gives a 6-th power (1771561 = 11⁶).

The spelling of 86806489 in words is "eighty-six million, eight hundred six thousand, four hundred eighty-nine".