25670899 has 4 divisors (see below), whose sum is σ = 25694136. Its totient is φ = 25647664.

The previous prime is 25670863. The next prime is 25670903. The reversal of 25670899 is 99807652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25670899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25670819) 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, 9874 + ... + 12199.

It is an arithmetic number, because the mean of its divisors is an integer number (6423534).

Almost surely, 2^25670899 is an apocalyptic number.

25670899 is a deficient number, since it is larger than the sum of its proper divisors (23237).

25670899 is a wasteful number, since it uses less digits than its factorization.

25670899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23236.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 25670899 is about 5066.6457346059. The cubic root of 25670899 is about 294.9943463438.

It can be divided in two parts, 25670 and 899, that added together give a square (26569 = 163²).

The spelling of 25670899 in words is "twenty-five million, six hundred seventy thousand, eight hundred ninety-nine".