25693 has 2 divisors, whose sum is σ = 25694. Its totient is φ = 25692.

The previous prime is 25679. The next prime is 25703. The reversal of 25693 is 39652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24964 + 729 = 158^2 + 27^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12846 + 12847.

It is an arithmetic number, because the mean of its divisors is an integer number (12847).

2²⁵⁶⁹³ is an apocalyptic number.

It is an amenable number.

25693 is a deficient number, since it is larger than the sum of its proper divisors (1).

25693 is an equidigital number, since it uses as much as digits as its factorization.

25693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 25693 is about 160.2903615318. The cubic root of 25693 is about 29.5078979141.

The spelling of 25693 in words is "twenty-five thousand, six hundred ninety-three".