83239978 has 8 divisors (see below), whose sum is σ = 124939872. Its totient is φ = 41593356.

The previous prime is 83239943. The next prime is 83239993. The reversal of 83239978 is 87993238.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9150 + ... + 15817.

It is an arithmetic number, because the mean of its divisors is an integer number (15617484).

Almost surely, 2^83239978 is an apocalyptic number.

83239978 is a deficient number, since it is larger than the sum of its proper divisors (41699894).

83239978 is a wasteful number, since it uses less digits than its factorization.

83239978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26636.

The product of its digits is 653184, while the sum is 49.

The square root of 83239978 is about 9123.5945767006. The cubic root of 83239978 is about 436.6270646317.

The spelling of 83239978 in words is "eighty-three million, two hundred thirty-nine thousand, nine hundred seventy-eight".