25389739 has 2 divisors, whose sum is σ = 25389740. Its totient is φ = 25389738.

The previous prime is 25389691. The next prime is 25389743. The reversal of 25389739 is 93798352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25389739 - 2⁹ = 25389227 is a prime.

It is not a weakly prime, because it can be changed into another prime (25389139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12694869 + 12694870.

It is an arithmetic number, because the mean of its divisors is an integer number (12694870).

Almost surely, 2^25389739 is an apocalyptic number.

25389739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25389739 is an equidigital number, since it uses as much as digits as its factorization.

25389739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 25389739 is about 5038.8231760998. The cubic root of 25389739 is about 293.9134172053.

The spelling of 25389739 in words is "twenty-five million, three hundred eighty-nine thousand, seven hundred thirty-nine".