123799925 has 6 divisors (see below), whose sum is σ = 153511938. Its totient is φ = 99039920.

The previous prime is 123799909. The next prime is 123799937. The reversal of 123799925 is 529997321.

It can be written as a sum of positive squares in 3 ways, for example, as 1874161 + 121925764 = 1369^2 + 11042^2 .

It is not a de Polignac number, because 123799925 - 2⁴ = 123799909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123799925.

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, 2475974 + ... + 2476023.

It is an arithmetic number, because the mean of its divisors is an integer number (25585323).

Almost surely, 2^123799925 is an apocalyptic number.

It is an amenable number.

123799925 is a deficient number, since it is larger than the sum of its proper divisors (29712013).

123799925 is an equidigital number, since it uses as much as digits as its factorization.

123799925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952007 (or 4952002 counting only the distinct ones).

The product of its digits is 306180, while the sum is 47.

The square root of 123799925 is about 11126.5414662419. The cubic root of 123799925 is about 498.3947518721.

The spelling of 123799925 in words is "one hundred twenty-three million, seven hundred ninety-nine thousand, nine hundred twenty-five".