25090391 has 2 divisors, whose sum is σ = 25090392. Its totient is φ = 25090390.

The previous prime is 25090381. The next prime is 25090409. The reversal of 25090391 is 19309052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25090391 - 2²² = 20896087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25090301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12545195 + 12545196.

It is an arithmetic number, because the mean of its divisors is an integer number (12545196).

Almost surely, 2^25090391 is an apocalyptic number.

25090391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25090391 is an equidigital number, since it uses as much as digits as its factorization.

25090391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 25090391 is about 5009.0309442047. The cubic root of 25090391 is about 292.7537564638.

The spelling of 25090391 in words is "twenty-five million, ninety thousand, three hundred ninety-one".