25508953 has 4 divisors (see below), whose sum is σ = 25990308. Its totient is φ = 25027600.

The previous prime is 25508897. The next prime is 25508957. The reversal of 25508953 is 35980552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12201049 + 13307904 = 3493^2 + 3648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25508953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25508957) 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, 240598 + ... + 240703.

It is an arithmetic number, because the mean of its divisors is an integer number (6497577).

Almost surely, 2^25508953 is an apocalyptic number.

It is an amenable number.

25508953 is a deficient number, since it is larger than the sum of its proper divisors (481355).

25508953 is an equidigital number, since it uses as much as digits as its factorization.

25508953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481354.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 25508953 is about 5050.6388704797. The cubic root of 25508953 is about 294.3727090095.

The spelling of 25508953 in words is "twenty-five million, five hundred eight thousand, nine hundred fifty-three".