123609925 has 6 divisors (see below), whose sum is σ = 153276338. Its totient is φ = 98887920.

The previous prime is 123609911. The next prime is 123609947. The reversal of 123609925 is 529906321.

It is a Cunningham number, because it is equal to 11118²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 123609924 = 1^2 + 11118^2 .

It is not a de Polignac number, because 123609925 - 2⁹ = 123609413 is a prime.

It is a Duffinian number.

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, 2472174 + ... + 2472223.

Almost surely, 2^123609925 is an apocalyptic number.

It is an amenable number.

123609925 is a deficient number, since it is larger than the sum of its proper divisors (29666413).

123609925 is an equidigital number, since it uses as much as digits as its factorization.

123609925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944407 (or 4944402 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 123609925 is about 11118.0000449721. Note that the first 4 decimals coincide. The cubic root of 123609925 is about 498.1396534729.

The spelling of 123609925 in words is "one hundred twenty-three million, six hundred nine thousand, nine hundred twenty-five".