25847997 has 16 divisors (see below), whose sum is σ = 39977472. Its totient is φ = 14549040.

The previous prime is 25847971. The next prime is 25848001. The reversal of 25847997 is 79974852.

It is not a de Polignac number, because 25847997 - 2¹⁴ = 25831613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25847597) 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, 7779 + ... + 10592.

It is an arithmetic number, because the mean of its divisors is an integer number (2498592).

Almost surely, 2^25847997 is an apocalyptic number.

It is an amenable number.

25847997 is a deficient number, since it is larger than the sum of its proper divisors (14129475).

25847997 is a wasteful number, since it uses less digits than its factorization.

25847997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18448.

The product of its digits is 1270080, while the sum is 51.

The square root of 25847997 is about 5084.0925443977. The cubic root of 25847997 is about 295.6711597992.

The spelling of 25847997 in words is "twenty-five million, eight hundred forty-seven thousand, nine hundred ninety-seven".