25709879 has 8 divisors (see below), whose sum is σ = 27830880. Its totient is φ = 23609376.

The previous prime is 25709861. The next prime is 25709891. The reversal of 25709879 is 97890752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25709879 - 2⁸ = 25709623 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 (25709809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2459 + ... + 7580.

It is an arithmetic number, because the mean of its divisors is an integer number (3478860).

Almost surely, 2^25709879 is an apocalyptic number.

25709879 is a deficient number, since it is larger than the sum of its proper divisors (2121001).

25709879 is a wasteful number, since it uses less digits than its factorization.

25709879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10249.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 25709879 is about 5070.4910018656. The cubic root of 25709879 is about 295.1435823115.

The spelling of 25709879 in words is "twenty-five million, seven hundred nine thousand, eight hundred seventy-nine".