25390609 has 4 divisors (see below), whose sum is σ = 25518400. Its totient is φ = 25262820.

The previous prime is 25390601. The next prime is 25390627. The reversal of 25390609 is 90609352.

It is a happy number.

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 25390609 - 2³ = 25390601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25390601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63597 + ... + 63994.

It is an arithmetic number, because the mean of its divisors is an integer number (6379600).

Almost surely, 2^25390609 is an apocalyptic number.

It is an amenable number.

25390609 is a deficient number, since it is larger than the sum of its proper divisors (127791).

25390609 is a wasteful number, since it uses less digits than its factorization.

25390609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127790.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 25390609 is about 5038.9095050417. The cubic root of 25390609 is about 293.9167742275.

The spelling of 25390609 in words is "twenty-five million, three hundred ninety thousand, six hundred nine".