25318439 has 2 divisors, whose sum is σ = 25318440. Its totient is φ = 25318438.

The previous prime is 25318427. The next prime is 25318451. The reversal of 25318439 is 93481352.

It is a balanced prime because it is at equal distance from previous prime (25318427) and next prime (25318451).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25318439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25318399 and 25318408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25318039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12659219 + 12659220.

It is an arithmetic number, because the mean of its divisors is an integer number (12659220).

Almost surely, 2^25318439 is an apocalyptic number.

25318439 is a deficient number, since it is larger than the sum of its proper divisors (1).

25318439 is an equidigital number, since it uses as much as digits as its factorization.

25318439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 25318439 is about 5031.7431373233. The cubic root of 25318439 is about 293.6380346489.

The spelling of 25318439 in words is "twenty-five million, three hundred eighteen thousand, four hundred thirty-nine".