25680899 has 4 divisors (see below), whose sum is σ = 26064264. Its totient is φ = 25297536.

The previous prime is 25680877. The next prime is 25680901. The reversal of 25680899 is 99808652.

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 25680899 - 2⁸ = 25680643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25680839) 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, 191582 + ... + 191715.

It is an arithmetic number, because the mean of its divisors is an integer number (6516066).

Almost surely, 2^25680899 is an apocalyptic number.

25680899 is a deficient number, since it is larger than the sum of its proper divisors (383365).

25680899 is an equidigital number, since it uses as much as digits as its factorization.

25680899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383364.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 25680899 is about 5067.6324847013. The cubic root of 25680899 is about 295.0326460089.

The spelling of 25680899 in words is "twenty-five million, six hundred eighty thousand, eight hundred ninety-nine".