25691079 has 4 divisors (see below), whose sum is σ = 34254776. Its totient is φ = 17127384.

The previous prime is 25691077. The next prime is 25691143. The reversal of 25691079 is 97019652.

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

It is not a de Polignac number, because 25691079 - 2¹ = 25691077 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 (25691077) 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, 4281844 + ... + 4281849.

It is an arithmetic number, because the mean of its divisors is an integer number (8563694).

Almost surely, 2^25691079 is an apocalyptic number.

25691079 is a deficient number, since it is larger than the sum of its proper divisors (8563697).

25691079 is an equidigital number, since it uses as much as digits as its factorization.

25691079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563696.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 25691079 is about 5068.6367989825. The cubic root of 25691079 is about 295.0716248568.

The spelling of 25691079 in words is "twenty-five million, six hundred ninety-one thousand, seventy-nine".