25993905 has 32 divisors (see below), whose sum is σ = 47755008. Its totient is φ = 11827200.

The previous prime is 25993897. The next prime is 25993907. The reversal of 25993905 is 50939952.

It is not a de Polignac number, because 25993905 - 2³ = 25993897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25993907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29065 + ... + 29945.

It is an arithmetic number, because the mean of its divisors is an integer number (1492344).

Almost surely, 2^25993905 is an apocalyptic number.

It is an amenable number.

25993905 is a deficient number, since it is larger than the sum of its proper divisors (21761103).

25993905 is a wasteful number, since it uses less digits than its factorization.

25993905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

The product of its (nonzero) digits is 109350, while the sum is 42.

The square root of 25993905 is about 5098.4218146403. The cubic root of 25993905 is about 296.2264557835.

The spelling of 25993905 in words is "twenty-five million, nine hundred ninety-three thousand, nine hundred five".