25903997 has 12 divisors (see below), whose sum is σ = 30221856. Its totient is φ = 22138200.

The previous prime is 25903991. The next prime is 25904027. The reversal of 25903997 is 79930952.

It is not a de Polignac number, because 25903997 - 2⁴ = 25903981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25903991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24122 + ... + 25172.

It is an arithmetic number, because the mean of its divisors is an integer number (2518488).

Almost surely, 2^25903997 is an apocalyptic number.

It is an amenable number.

25903997 is a deficient number, since it is larger than the sum of its proper divisors (4317859).

25903997 is a wasteful number, since it uses less digits than its factorization.

25903997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568 (or 1561 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 25903997 is about 5089.5969388548. The cubic root of 25903997 is about 295.8845308381.

The spelling of 25903997 in words is "twenty-five million, nine hundred three thousand, nine hundred ninety-seven".