25475939 has 2 divisors, whose sum is σ = 25475940. Its totient is φ = 25475938.

The previous prime is 25475921. The next prime is 25475981. The reversal of 25475939 is 93957452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25475939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25475939.

It is not a weakly prime, because it can be changed into another prime (25475039) 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 as a sum of consecutive naturals, namely, 12737969 + 12737970.

It is an arithmetic number, because the mean of its divisors is an integer number (12737970).

Almost surely, 2^25475939 is an apocalyptic number.

25475939 is a deficient number, since it is larger than the sum of its proper divisors (1).

25475939 is an equidigital number, since it uses as much as digits as its factorization.

25475939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 44.

The square root of 25475939 is about 5047.3695129245. The cubic root of 25475939 is about 294.2456605938.

The spelling of 25475939 in words is "twenty-five million, four hundred seventy-five thousand, nine hundred thirty-nine".