25974609 has 4 divisors (see below), whose sum is σ = 34632816. Its totient is φ = 17316404.

The previous prime is 25974583. The next prime is 25974661. The reversal of 25974609 is 90647952.

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 a cyclic number.

It is not a de Polignac number, because 25974609 - 2⁸ = 25974353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25974209) 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, 4329099 + ... + 4329104.

It is an arithmetic number, because the mean of its divisors is an integer number (8658204).

Almost surely, 2^25974609 is an apocalyptic number.

It is an amenable number.

25974609 is a deficient number, since it is larger than the sum of its proper divisors (8658207).

25974609 is an equidigital number, since it uses as much as digits as its factorization.

25974609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658206.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 25974609 is about 5096.5291130337. The cubic root of 25974609 is about 296.1531385879.

The spelling of 25974609 in words is "twenty-five million, nine hundred seventy-four thousand, six hundred nine".