25613939 has 8 divisors (see below), whose sum is σ = 28226352. Its totient is φ = 23093280.

The previous prime is 25613909. The next prime is 25613941. The reversal of 25613939 is 93931652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25613939 - 2⁸ = 25613683 is a prime.

It is a Duffinian number.

25613939 is a modest number, since divided by 3939 gives 2561 as remainder.

It is not an unprimeable number, because it can be changed into a prime (25613909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22352 + ... + 23469.

It is an arithmetic number, because the mean of its divisors is an integer number (3528294).

Almost surely, 2^25613939 is an apocalyptic number.

25613939 is a deficient number, since it is larger than the sum of its proper divisors (2612413).

25613939 is a wasteful number, since it uses less digits than its factorization.

25613939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45877.

The product of its digits is 43740, while the sum is 38.

The square root of 25613939 is about 5061.0215371998. The cubic root of 25613939 is about 294.7760015555.

The spelling of 25613939 in words is "twenty-five million, six hundred thirteen thousand, nine hundred thirty-nine".