99438725 has 6 divisors (see below), whose sum is σ = 123304050. Its totient is φ = 79550960.

The previous prime is 99438679. The next prime is 99438733. The reversal of 99438725 is 52783499.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1151329 + 98287396 = 1073^2 + 9914^2 .

It is a de Polignac number, because none of the positive numbers 2^k-99438725 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99438725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1988750 + ... + 1988799.

It is an arithmetic number, because the mean of its divisors is an integer number (20550675).

Almost surely, 2^99438725 is an apocalyptic number.

It is an amenable number.

99438725 is a deficient number, since it is larger than the sum of its proper divisors (23865325).

99438725 is a wasteful number, since it uses less digits than its factorization.

99438725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977559 (or 3977554 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 99438725 is about 9971.8967603962. The cubic root of 99438725 is about 463.2888509763.

The spelling of 99438725 in words is "ninety-nine million, four hundred thirty-eight thousand, seven hundred twenty-five".