25750391 has 2 divisors, whose sum is σ = 25750392. Its totient is φ = 25750390.

The previous prime is 25750369. The next prime is 25750399. The reversal of 25750391 is 19305752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25750391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25750399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12875195 + 12875196.

It is an arithmetic number, because the mean of its divisors is an integer number (12875196).

Almost surely, 2^25750391 is an apocalyptic number.

25750391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25750391 is an equidigital number, since it uses as much as digits as its factorization.

25750391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 25750391 is about 5074.4843087746. The cubic root of 25750391 is about 295.2985238162.

The spelling of 25750391 in words is "twenty-five million, seven hundred fifty thousand, three hundred ninety-one".