83920431 has 8 divisors (see below), whose sum is σ = 127878784. Its totient is φ = 47954520.

The previous prime is 83920411. The next prime is 83920433. The reversal of 83920431 is 13402938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83920431 - 2⁹ = 83919919 is a prime.

It is a super-2 number, since 2×83920431² = 14085277478451522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83920433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1998085 + ... + 1998126.

It is an arithmetic number, because the mean of its divisors is an integer number (15984848).

Almost surely, 2^83920431 is an apocalyptic number.

83920431 is a deficient number, since it is larger than the sum of its proper divisors (43958353).

83920431 is a wasteful number, since it uses less digits than its factorization.

83920431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996221.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 83920431 is about 9160.8095166312. The cubic root of 83920431 is about 437.8135869860.

The spelling of 83920431 in words is "eighty-three million, nine hundred twenty thousand, four hundred thirty-one".