25723906 has 8 divisors (see below), whose sum is σ = 41554044. Its totient is φ = 11872560.

The previous prime is 25723903. The next prime is 25723909. The reversal of 25723906 is 60932752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25723903) and next prime (25723909).

It can be written as a sum of positive squares in 2 ways, for example, as 24098281 + 1625625 = 4909^2 + 1275^2 .

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

It is not an unprimeable number, because it can be changed into a prime (25723903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494665 + ... + 494716.

Almost surely, 2^25723906 is an apocalyptic number.

25723906 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25723906 is a deficient number, since it is larger than the sum of its proper divisors (15830138).

25723906 is a wasteful number, since it uses less digits than its factorization.

25723906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989396.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 25723906 is about 5071.8740126308. The cubic root of 25723906 is about 295.1972481462.

The spelling of 25723906 in words is "twenty-five million, seven hundred twenty-three thousand, nine hundred six".