25823409 has 4 divisors (see below), whose sum is σ = 34431216. Its totient is φ = 17215604.

The previous prime is 25823407. The next prime is 25823423. The reversal of 25823409 is 90432852.

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 25823409 - 2¹ = 25823407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25823409.

It is not an unprimeable number, because it can be changed into a prime (25823407) 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, 4303899 + ... + 4303904.

It is an arithmetic number, because the mean of its divisors is an integer number (8607804).

Almost surely, 2^25823409 is an apocalyptic number.

It is an amenable number.

25823409 is a deficient number, since it is larger than the sum of its proper divisors (8607807).

25823409 is an equidigital number, since it uses as much as digits as its factorization.

25823409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8607806.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 25823409 is about 5081.6738384119. The cubic root of 25823409 is about 295.5773773050.

The spelling of 25823409 in words is "twenty-five million, eight hundred twenty-three thousand, four hundred nine".