25775879 has 4 divisors (see below), whose sum is σ = 25840560. Its totient is φ = 25711200.

The previous prime is 25775857. The next prime is 25775887. The reversal of 25775879 is 97857752.

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 25775879 - 2²⁴ = 8998663 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 (25775819) 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, 31739 + ... + 32540.

It is an arithmetic number, because the mean of its divisors is an integer number (6460140).

Almost surely, 2^25775879 is an apocalyptic number.

25775879 is a deficient number, since it is larger than the sum of its proper divisors (64681).

25775879 is an equidigital number, since it uses as much as digits as its factorization.

25775879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64680.

The product of its digits is 1234800, while the sum is 50.

The square root of 25775879 is about 5076.9950758298. The cubic root of 25775879 is about 295.3959215198.

Adding to 25775879 its sum of digits (50), we get a square (25775929 = 5077²).

The spelling of 25775879 in words is "twenty-five million, seven hundred seventy-five thousand, eight hundred seventy-nine".