25668239 has 2 divisors, whose sum is σ = 25668240. Its totient is φ = 25668238.

The previous prime is 25668233. The next prime is 25668263. The reversal of 25668239 is 93286652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25668239 - 2¹² = 25664143 is a prime.

It is a super-2 number, since 2×25668239² = 1317716986722242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25668196 and 25668205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25668233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12834119 + 12834120.

It is an arithmetic number, because the mean of its divisors is an integer number (12834120).

Almost surely, 2^25668239 is an apocalyptic number.

25668239 is a deficient number, since it is larger than the sum of its proper divisors (1).

25668239 is an equidigital number, since it uses as much as digits as its factorization.

25668239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 25668239 is about 5066.3832267210. The cubic root of 25668239 is about 294.9841569582.

The spelling of 25668239 in words is "twenty-five million, six hundred sixty-eight thousand, two hundred thirty-nine".