83605725 has 72 divisors (see below), whose sum is σ = 173064320. Its totient is φ = 37791360.

The previous prime is 83605723. The next prime is 83605747. The reversal of 83605725 is 52750638.

83605725 is a `hidden beast` number, since 83 + 6 + 0 + 572 + 5 = 666.

It is not a de Polignac number, because 83605725 - 2¹ = 83605723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83605725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83605721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 171432 + ... + 171918.

Almost surely, 2^83605725 is an apocalyptic number.

It is an amenable number.

83605725 is an abundant number, since it is smaller than the sum of its proper divisors (89458595).

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

83605725 is a wasteful number, since it uses less digits than its factorization.

83605725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 83605725 is about 9143.6166258215. The cubic root of 83605725 is about 437.2656268473.

The spelling of 83605725 in words is "eighty-three million, six hundred five thousand, seven hundred twenty-five".