83678931 has 12 divisors (see below), whose sum is σ = 138136752. Its totient is φ = 47816496.

The previous prime is 83678929. The next prime is 83678939. The reversal of 83678931 is 13987638.

It is a happy number.

It is not a de Polignac number, because 83678931 - 2¹ = 83678929 is a prime.

It is a super-2 number, since 2×83678931² = 14004326986605522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (83678939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 664056 + ... + 664181.

It is an arithmetic number, because the mean of its divisors is an integer number (11511396).

Almost surely, 2^83678931 is an apocalyptic number.

83678931 is a deficient number, since it is larger than the sum of its proper divisors (54457821).

83678931 is a wasteful number, since it uses less digits than its factorization.

83678931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328250 (or 1328247 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 83678931 is about 9147.6188705040. The cubic root of 83678931 is about 437.3932143187.

The spelling of 83678931 in words is "eighty-three million, six hundred seventy-eight thousand, nine hundred thirty-one".