84045731 has 24 divisors (see below), whose sum is σ = 107305920. Its totient is φ = 65091600.

The previous prime is 84045727. The next prime is 84045751. The reversal of 84045731 is 13754048.

It is not a de Polignac number, because 84045731 - 2² = 84045727 is a prime.

It is a super-2 number, since 2×84045731² = 14127369798648722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84045751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113360 + ... + 114098.

It is an arithmetic number, because the mean of its divisors is an integer number (4471080).

Almost surely, 2^84045731 is an apocalyptic number.

84045731 is a deficient number, since it is larger than the sum of its proper divisors (23260189).

84045731 is a wasteful number, since it uses less digits than its factorization.

84045731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 84045731 is about 9167.6458810318. The cubic root of 84045731 is about 438.0313756775.

Adding to 84045731 its reverse (13754048), we get a palindrome (97799779).

The spelling of 84045731 in words is "eighty-four million, forty-five thousand, seven hundred thirty-one".