25091497 has 2 divisors, whose sum is σ = 25091498. Its totient is φ = 25091496.

The previous prime is 25091483. The next prime is 25091509. The reversal of 25091497 is 79419052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14470416 + 10621081 = 3804^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 25091497 - 2¹⁵ = 25058729 is a prime.

It is not a weakly prime, because it can be changed into another prime (25091477) 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, 12545748 + 12545749.

It is an arithmetic number, because the mean of its divisors is an integer number (12545749).

Almost surely, 2^25091497 is an apocalyptic number.

It is an amenable number.

25091497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25091497 is an equidigital number, since it uses as much as digits as its factorization.

25091497 is an odious number, because the sum of its binary digits is odd.

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

The square root of 25091497 is about 5009.1413435837. The cubic root of 25091497 is about 292.7580579897.

The spelling of 25091497 in words is "twenty-five million, ninety-one thousand, four hundred ninety-seven".