25387013 has 2 divisors, whose sum is σ = 25387014. Its totient is φ = 25387012.

The previous prime is 25386971. The next prime is 25387049. The reversal of 25387013 is 31078352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14876449 + 10510564 = 3857^2 + 3242^2 .

It is a cyclic number.

It is not a de Polignac number, because 25387013 - 2¹⁴ = 25370629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25387213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12693506 + 12693507.

It is an arithmetic number, because the mean of its divisors is an integer number (12693507).

Almost surely, 2^25387013 is an apocalyptic number.

It is an amenable number.

25387013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25387013 is an equidigital number, since it uses as much as digits as its factorization.

25387013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 25387013 is about 5038.5526691700. The cubic root of 25387013 is about 293.9028980391.

The spelling of 25387013 in words is "twenty-five million, three hundred eighty-seven thousand, thirteen".