25952309 has 4 divisors (see below), whose sum is σ = 27318240. Its totient is φ = 24586380.

The previous prime is 25952299. The next prime is 25952327. The reversal of 25952309 is 90325952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25952309 - 2²⁴ = 9175093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25952359) 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, 682937 + ... + 682974.

It is an arithmetic number, because the mean of its divisors is an integer number (6829560).

Almost surely, 2^25952309 is an apocalyptic number.

It is an amenable number.

25952309 is a deficient number, since it is larger than the sum of its proper divisors (1365931).

25952309 is a wasteful number, since it uses less digits than its factorization.

25952309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365930.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 25952309 is about 5094.3408798391. The cubic root of 25952309 is about 296.0683621322.

The spelling of 25952309 in words is "twenty-five million, nine hundred fifty-two thousand, three hundred nine".