25700839 has 2 divisors, whose sum is σ = 25700840. Its totient is φ = 25700838.

The previous prime is 25700791. The next prime is 25700849. The reversal of 25700839 is 93800752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25700839 - 2⁹ = 25700327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25700849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12850419 + 12850420.

It is an arithmetic number, because the mean of its divisors is an integer number (12850420).

Almost surely, 2^25700839 is an apocalyptic number.

25700839 is a deficient number, since it is larger than the sum of its proper divisors (1).

25700839 is an equidigital number, since it uses as much as digits as its factorization.

25700839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 25700839 is about 5069.5994910841. The cubic root of 25700839 is about 295.1089858728.

The spelling of 25700839 in words is "twenty-five million, seven hundred thousand, eight hundred thirty-nine".