83638931 has 8 divisors (see below), whose sum is σ = 89534400. Its totient is φ = 77892840.

The previous prime is 83638927. The next prime is 83638943. The reversal of 83638931 is 13983638.

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

It is a cyclic number.

It is not a de Polignac number, because 83638931 - 2² = 83638927 is a prime.

It is a super-2 number, since 2×83638931² = 13990941557645522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83638531) 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, 36185 + ... + 38426.

It is an arithmetic number, because the mean of its divisors is an integer number (11191800).

Almost surely, 2^83638931 is an apocalyptic number.

83638931 is a deficient number, since it is larger than the sum of its proper divisors (5895469).

83638931 is a wasteful number, since it uses less digits than its factorization.

83638931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74689.

The product of its digits is 93312, while the sum is 41.

The square root of 83638931 is about 9145.4322478492. The cubic root of 83638931 is about 437.3235093290.

The spelling of 83638931 in words is "eighty-three million, six hundred thirty-eight thousand, nine hundred thirty-one".