25990039 has 4 divisors (see below), whose sum is σ = 26303256. Its totient is φ = 25676824.

The previous prime is 25990033. The next prime is 25990051. The reversal of 25990039 is 93009952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25990039 - 2⁹ = 25989527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25990033) 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 in 3 ways as a sum of consecutive naturals, for example, 156484 + ... + 156649.

It is an arithmetic number, because the mean of its divisors is an integer number (6575814).

Almost surely, 2^25990039 is an apocalyptic number.

25990039 is a deficient number, since it is larger than the sum of its proper divisors (313217).

25990039 is an equidigital number, since it uses as much as digits as its factorization.

25990039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313216.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 25990039 is about 5098.0426636112. The cubic root of 25990039 is about 296.2117694143.

The spelling of 25990039 in words is "twenty-five million, nine hundred ninety thousand, thirty-nine".