84231999 has 48 divisors (see below), whose sum is σ = 130908960. Its totient is φ = 52116480.

The previous prime is 84231977. The next prime is 84232009. The reversal of 84231999 is 99913248.

It is not a de Polignac number, because 84231999 - 2⁵ = 84231967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84231919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1153827 + ... + 1153899.

It is an arithmetic number, because the mean of its divisors is an integer number (2727270).

Almost surely, 2^84231999 is an apocalyptic number.

84231999 is a deficient number, since it is larger than the sum of its proper divisors (46676961).

84231999 is a wasteful number, since it uses less digits than its factorization.

84231999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 229 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 84231999 is about 9177.7992460066. The cubic root of 84231999 is about 438.3547354538.

The spelling of 84231999 in words is "eighty-four million, two hundred thirty-one thousand, nine hundred ninety-nine".