25131739 has 2 divisors, whose sum is σ = 25131740. Its totient is φ = 25131738.

The previous prime is 25131713. The next prime is 25131749. The reversal of 25131739 is 93713152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25131739 - 2⁵ = 25131707 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25131739.

It is not a weakly prime, because it can be changed into another prime (25131749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565869 + 12565870.

It is an arithmetic number, because the mean of its divisors is an integer number (12565870).

Almost surely, 2^25131739 is an apocalyptic number.

25131739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25131739 is an equidigital number, since it uses as much as digits as its factorization.

25131739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 31.

The square root of 25131739 is about 5013.1565904129. The cubic root of 25131739 is about 292.9144838514.

The spelling of 25131739 in words is "twenty-five million, one hundred thirty-one thousand, seven hundred thirty-nine".