83918931 has 4 divisors (see below), whose sum is σ = 111891912. Its totient is φ = 55945952.

The previous prime is 83918921. The next prime is 83918957. The reversal of 83918931 is 13981938.

It is a happy number.

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 83918931 - 2⁵ = 83918899 is a prime.

It is a super-2 number, since 2×83918931² = 14084773960365522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83918921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13986486 + ... + 13986491.

It is an arithmetic number, because the mean of its divisors is an integer number (27972978).

Almost surely, 2^83918931 is an apocalyptic number.

83918931 is a deficient number, since it is larger than the sum of its proper divisors (27972981).

83918931 is a wasteful number, since it uses less digits than its factorization.

83918931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27972980.

The product of its digits is 46656, while the sum is 42.

The square root of 83918931 is about 9160.7276457714. The cubic root of 83918931 is about 437.8109784663.

The spelling of 83918931 in words is "eighty-three million, nine hundred eighteen thousand, nine hundred thirty-one".