25904947 has 4 divisors (see below), whose sum is σ = 26291656. Its totient is φ = 25518240.

The previous prime is 25904941. The next prime is 25904959. The reversal of 25904947 is 74940952.

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-25904947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25904941) 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 3 ways as a sum of consecutive naturals, for example, 193254 + ... + 193387.

It is an arithmetic number, because the mean of its divisors is an integer number (6572914).

Almost surely, 2^25904947 is an apocalyptic number.

25904947 is a deficient number, since it is larger than the sum of its proper divisors (386709).

25904947 is an equidigital number, since it uses as much as digits as its factorization.

25904947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386708.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 25904947 is about 5089.6902656252. The cubic root of 25904947 is about 295.8881478715. Note that the first 3 decimals are identical.

The spelling of 25904947 in words is "twenty-five million, nine hundred four thousand, nine hundred forty-seven".