83670979 has 12 divisors (see below), whose sum is σ = 97706208. Its totient is φ = 71442000.

The previous prime is 83670929. The next prime is 83671009. The reversal of 83670979 is 97907638.

It is not a de Polignac number, because 83670979 - 2¹⁹ = 83146691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83670919) 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, 10129 + ... + 16429.

It is an arithmetic number, because the mean of its divisors is an integer number (8142184).

Almost surely, 2^83670979 is an apocalyptic number.

83670979 is a deficient number, since it is larger than the sum of its proper divisors (14035229).

83670979 is a wasteful number, since it uses less digits than its factorization.

83670979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586 (or 6579 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 83670979 is about 9147.1842115484. The cubic root of 83670979 is about 437.3793587361.

The spelling of 83670979 in words is "eighty-three million, six hundred seventy thousand, nine hundred seventy-nine".