25679 has 2 divisors, whose sum is σ = 25680. Its totient is φ = 25678.

The previous prime is 25673. The next prime is 25693. The reversal of 25679 is 97652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25679 - 2⁸ = 25423 is a prime.

It is a super-2 number, since 2×25679² = 1318822082, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839 + 12840.

It is an arithmetic number, because the mean of its divisors is an integer number (12840).

2²⁵⁶⁷⁹ is an apocalyptic number.

25679 is a deficient number, since it is larger than the sum of its proper divisors (1).

25679 is an equidigital number, since it uses as much as digits as its factorization.

25679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 25679 is about 160.2466848331. The cubic root of 25679 is about 29.5025373667.

The spelling of 25679 in words is "twenty-five thousand, six hundred seventy-nine".