25030639 has 2 divisors, whose sum is σ = 25030640. Its totient is φ = 25030638.

The previous prime is 25030633. The next prime is 25030661. The reversal of 25030639 is 93603052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25030639 - 2²¹ = 22933487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25030633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12515319 + 12515320.

It is an arithmetic number, because the mean of its divisors is an integer number (12515320).

Almost surely, 2^25030639 is an apocalyptic number.

25030639 is a deficient number, since it is larger than the sum of its proper divisors (1).

25030639 is an equidigital number, since it uses as much as digits as its factorization.

25030639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 25030639 is about 5003.0629618265. The cubic root of 25030639 is about 292.5211770286.

The spelling of 25030639 in words is "twenty-five million, thirty thousand, six hundred thirty-nine".