84195431 has 4 divisors (see below), whose sum is σ = 84216600. Its totient is φ = 84174264.

The previous prime is 84195413. The next prime is 84195443. The reversal of 84195431 is 13459148.

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

It is a cyclic number.

It is not a de Polignac number, because 84195431 - 2⁶ = 84195367 is a prime.

It is a super-2 number, since 2×84195431² = 14177741202551522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84195391 and 84195400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84195451) 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, 2621 + ... + 13238.

It is an arithmetic number, because the mean of its divisors is an integer number (21054150).

Almost surely, 2^84195431 is an apocalyptic number.

84195431 is a deficient number, since it is larger than the sum of its proper divisors (21169).

84195431 is a wasteful number, since it uses less digits than its factorization.

84195431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21168.

The product of its digits is 17280, while the sum is 35.

The square root of 84195431 is about 9175.8068310095. The cubic root of 84195431 is about 438.2912913297.

The spelling of 84195431 in words is "eighty-four million, one hundred ninety-five thousand, four hundred thirty-one".