25947091 has 2 divisors, whose sum is σ = 25947092. Its totient is φ = 25947090.

The previous prime is 25947071. The next prime is 25947107. The reversal of 25947091 is 19074952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25947091 - 2⁹ = 25946579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25947091.

It is not a weakly prime, because it can be changed into another prime (25947011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12973545 + 12973546.

It is an arithmetic number, because the mean of its divisors is an integer number (12973546).

Almost surely, 2^25947091 is an apocalyptic number.

25947091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25947091 is an equidigital number, since it uses as much as digits as its factorization.

25947091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 25947091 is about 5093.8287171832. The cubic root of 25947091 is about 296.0485181912.

The spelling of 25947091 in words is "twenty-five million, nine hundred forty-seven thousand, ninety-one".