25972899 has 4 divisors (see below), whose sum is σ = 34630536. Its totient is φ = 17315264.

The previous prime is 25972873. The next prime is 25972907. The reversal of 25972899 is 99827952.

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

It is a cyclic number.

It is not a de Polignac number, because 25972899 - 2¹¹ = 25970851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25972099) 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, 4328814 + ... + 4328819.

It is an arithmetic number, because the mean of its divisors is an integer number (8657634).

Almost surely, 2^25972899 is an apocalyptic number.

25972899 is a deficient number, since it is larger than the sum of its proper divisors (8657637).

25972899 is an equidigital number, since it uses as much as digits as its factorization.

25972899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657636.

The product of its digits is 816480, while the sum is 51.

The square root of 25972899 is about 5096.3613490411. The cubic root of 25972899 is about 296.1466395105.

The spelling of 25972899 in words is "twenty-five million, nine hundred seventy-two thousand, eight hundred ninety-nine".