25109957 has 2 divisors, whose sum is σ = 25109958. Its totient is φ = 25109956.

The previous prime is 25109947. The next prime is 25109971. The reversal of 25109957 is 75990152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24611521 + 498436 = 4961^2 + 706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25109957 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25109957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25109947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12554978 + 12554979.

It is an arithmetic number, because the mean of its divisors is an integer number (12554979).

Almost surely, 2^25109957 is an apocalyptic number.

It is an amenable number.

25109957 is a deficient number, since it is larger than the sum of its proper divisors (1).

25109957 is an equidigital number, since it uses as much as digits as its factorization.

25109957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 25109957 is about 5010.9836359741. The cubic root of 25109957 is about 292.8298351467.

The spelling of 25109957 in words is "twenty-five million, one hundred nine thousand, nine hundred fifty-seven".