25913906 has 4 divisors (see below), whose sum is σ = 38870862. Its totient is φ = 12956952.

The previous prime is 25913851. The next prime is 25913911. The reversal of 25913906 is 60931952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16883881 + 9030025 = 4109^2 + 3005^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6478475 + ... + 6478478.

Almost surely, 2^25913906 is an apocalyptic number.

25913906 is a deficient number, since it is larger than the sum of its proper divisors (12956956).

25913906 is a wasteful number, since it uses less digits than its factorization.

25913906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12956955.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 25913906 is about 5090.5703020389. The cubic root of 25913906 is about 295.9222540518.

The spelling of 25913906 in words is "twenty-five million, nine hundred thirteen thousand, nine hundred six".