25630039 has 2 divisors, whose sum is σ = 25630040. Its totient is φ = 25630038.

The previous prime is 25630009. The next prime is 25630057. The reversal of 25630039 is 93003652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25630039 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25629989 and 25630016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25630009) 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, 12815019 + 12815020.

It is an arithmetic number, because the mean of its divisors is an integer number (12815020).

Almost surely, 2^25630039 is an apocalyptic number.

25630039 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630039 is an equidigital number, since it uses as much as digits as its factorization.

25630039 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 25630039 is about 5062.6118753071. The cubic root of 25630039 is about 294.8377504806.

The spelling of 25630039 in words is "twenty-five million, six hundred thirty thousand, thirty-nine".