83139476 has 36 divisors (see below), whose sum is σ = 171032148. Its totient is φ = 35255808.

The previous prime is 83139461. The next prime is 83139487. The reversal of 83139476 is 67493138.

It can be written as a sum of positive squares in 2 ways, for example, as 42562576 + 40576900 = 6524^2 + 6370^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16826 + ... + 21198.

It is an arithmetic number, because the mean of its divisors is an integer number (4750893).

Almost surely, 2^83139476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83139476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85516074).

83139476 is an abundant number, since it is smaller than the sum of its proper divisors (87892672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83139476 is a wasteful number, since it uses less digits than its factorization.

83139476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488 (or 4479 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 83139476 is about 9118.0851059858. The cubic root of 83139476 is about 436.4512694316.

The spelling of 83139476 in words is "eighty-three million, one hundred thirty-nine thousand, four hundred seventy-six".