99725 has 6 divisors (see below), whose sum is σ = 123690. Its totient is φ = 79760.

The previous prime is 99721. The next prime is 99733. The reversal of 99725 is 52799.

It can be written as a sum of positive squares in 3 ways, for example, as 5476 + 94249 = 74^2 + 307^2 .

It is not a de Polignac number, because 99725 - 2² = 99721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99691 and 99700.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 99725.

It is not an unprimeable number, because it can be changed into a prime (99721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1970 + ... + 2019.

It is an arithmetic number, because the mean of its divisors is an integer number (20615).

2⁹⁹⁷²⁵ is an apocalyptic number.

It is an amenable number.

99725 is a deficient number, since it is larger than the sum of its proper divisors (23965).

99725 is a wasteful number, since it uses less digits than its factorization.

99725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999 (or 3994 counting only the distinct ones).

The product of its digits is 5670, while the sum is 32.

The square root of 99725 is about 315.7926534928. The cubic root of 99725 is about 46.3733013766.

The spelling of 99725 in words is "ninety-nine thousand, seven hundred twenty-five".