83331691 has 4 divisors (see below), whose sum is σ = 86954832. Its totient is φ = 79708552.

The previous prime is 83331683. The next prime is 83331697. The reversal of 83331691 is 19613338.

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 83331691 - 2³ = 83331683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83331697) 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, 1811536 + ... + 1811581.

It is an arithmetic number, because the mean of its divisors is an integer number (21738708).

Almost surely, 2^83331691 is an apocalyptic number.

83331691 is a deficient number, since it is larger than the sum of its proper divisors (3623141).

83331691 is a wasteful number, since it uses less digits than its factorization.

83331691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623140.

The product of its digits is 11664, while the sum is 34.

The square root of 83331691 is about 9128.6193370082. The cubic root of 83331691 is about 436.7873629287.

The spelling of 83331691 in words is "eighty-three million, three hundred thirty-one thousand, six hundred ninety-one".