25831879 has 4 divisors (see below), whose sum is σ = 25849384. Its totient is φ = 25814376.

The previous prime is 25831877. The next prime is 25831889. The reversal of 25831879 is 97813852.

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 25831879 - 2¹ = 25831877 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 (25831873) 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, 6312 + ... + 9565.

It is an arithmetic number, because the mean of its divisors is an integer number (6462346).

Almost surely, 2^25831879 is an apocalyptic number.

25831879 is a deficient number, since it is larger than the sum of its proper divisors (17505).

25831879 is a wasteful number, since it uses less digits than its factorization.

25831879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17504.

The product of its digits is 120960, while the sum is 43.

The square root of 25831879 is about 5082.5071569059. The cubic root of 25831879 is about 295.6096899341.

The spelling of 25831879 in words is "twenty-five million, eight hundred thirty-one thousand, eight hundred seventy-nine".