83612500 has 36 divisors (see below), whose sum is σ = 182917980. Its totient is φ = 33440000.

The previous prime is 83612497. The next prime is 83612519. The reversal of 83612500 is 521638.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 55860676 + 27751824 = 7474^2 + 5268^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 9156 + ... + 15844.

It is an arithmetic number, because the mean of its divisors is an integer number (5081055).

Almost surely, 2^83612500 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 83612500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91458990).

83612500 is an abundant number, since it is smaller than the sum of its proper divisors (99305480).

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

83612500 is an equidigital number, since it uses as much as digits as its factorization.

83612500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718 (or 6696 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 83612500 is about 9143.9870953540. The cubic root of 83612500 is about 437.2774378192.

The spelling of 83612500 in words is "eighty-three million, six hundred twelve thousand, five hundred".