25605923 has 16 divisors (see below), whose sum is σ = 30896640. Its totient is φ = 20746176.

The previous prime is 25605919. The next prime is 25605959. The reversal of 25605923 is 32950652.

It is a cyclic number.

It is not a de Polignac number, because 25605923 - 2² = 25605919 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 25605923.

It is not an unprimeable number, because it can be changed into a prime (25605023) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 13436 + ... + 15222.

It is an arithmetic number, because the mean of its divisors is an integer number (1931040).

Almost surely, 2^25605923 is an apocalyptic number.

25605923 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25605923 is a deficient number, since it is larger than the sum of its proper divisors (5290717).

25605923 is a wasteful number, since it uses less digits than its factorization.

25605923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 25605923 is about 5060.2295402481. The cubic root of 25605923 is about 294.7452478453.

The spelling of 25605923 in words is "twenty-five million, six hundred five thousand, nine hundred twenty-three".