83139284 has 24 divisors (see below), whose sum is σ = 147987840. Its totient is φ = 40862016.

The previous prime is 83139283. The next prime is 83139289. The reversal of 83139284 is 48293138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83139283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96584 + ... + 97440.

It is an arithmetic number, because the mean of its divisors is an integer number (6166160).

Almost surely, 2^83139284 is an apocalyptic number.

It is an amenable number.

83139284 is a deficient number, since it is larger than the sum of its proper divisors (64848556).

83139284 is a wasteful number, since it uses less digits than its factorization.

83139284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1245 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 83139284 is about 9118.0745774533. The cubic root of 83139284 is about 436.4509334552.

The spelling of 83139284 in words is "eighty-three million, one hundred thirty-nine thousand, two hundred eighty-four".