83978683 has 4 divisors (see below), whose sum is σ = 84126328. Its totient is φ = 83831040.

The previous prime is 83978677. The next prime is 83978711. The reversal of 83978683 is 38687938.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83978683 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83978683.

It is not an unprimeable number, because it can be changed into a prime (83978603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72966 + ... + 74107.

It is an arithmetic number, because the mean of its divisors is an integer number (21031582).

Almost surely, 2^83978683 is an apocalyptic number.

83978683 is a deficient number, since it is larger than the sum of its proper divisors (147645).

83978683 is a wasteful number, since it uses less digits than its factorization.

83978683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147644.

The product of its digits is 1741824, while the sum is 52.

The square root of 83978683 is about 9163.9883784300. The cubic root of 83978683 is about 437.9148639460.

The spelling of 83978683 in words is "eighty-three million, nine hundred seventy-eight thousand, six hundred eighty-three".