25305079 has 4 divisors (see below), whose sum is σ = 25336080. Its totient is φ = 25274080.

The previous prime is 25305053. The next prime is 25305097. The reversal of 25305079 is 97050352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25305079 - 2⁹ = 25304567 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25305079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25305479) 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, 14242 + ... + 15919.

It is an arithmetic number, because the mean of its divisors is an integer number (6334020).

Almost surely, 2^25305079 is an apocalyptic number.

25305079 is a deficient number, since it is larger than the sum of its proper divisors (31001).

25305079 is an equidigital number, since it uses as much as digits as its factorization.

25305079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31000.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 25305079 is about 5030.4153904027. The cubic root of 25305079 is about 293.5863767199.

The spelling of 25305079 in words is "twenty-five million, three hundred five thousand, seventy-nine".