99825725 has 6 divisors (see below), whose sum is σ = 123783930. Its totient is φ = 79860560.

The previous prime is 99825689. The next prime is 99825731. The reversal of 99825725 is 52752899.

It can be written as a sum of positive squares in 3 ways, for example, as 10201636 + 89624089 = 3194^2 + 9467^2 .

It is not a de Polignac number, because 99825725 - 2⁸ = 99825469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99825725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1996490 + ... + 1996539.

It is an arithmetic number, because the mean of its divisors is an integer number (20630655).

Almost surely, 2^99825725 is an apocalyptic number.

It is an amenable number.

99825725 is a deficient number, since it is larger than the sum of its proper divisors (23958205).

99825725 is a wasteful number, since it uses less digits than its factorization.

99825725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993039 (or 3993034 counting only the distinct ones).

The product of its digits is 453600, while the sum is 47.

The square root of 99825725 is about 9991.2824502163. The cubic root of 99825725 is about 463.8890889411.

The spelling of 99825725 in words is "ninety-nine million, eight hundred twenty-five thousand, seven hundred twenty-five".