25097791 has 2 divisors, whose sum is σ = 25097792. Its totient is φ = 25097790.

The previous prime is 25097783. The next prime is 25097837. The reversal of 25097791 is 19779052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25097791 - 2³ = 25097783 is a prime.

It is a super-2 number, since 2×25097791² = 1259798226159362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25097711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12548895 + 12548896.

It is an arithmetic number, because the mean of its divisors is an integer number (12548896).

Almost surely, 2^25097791 is an apocalyptic number.

25097791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25097791 is an equidigital number, since it uses as much as digits as its factorization.

25097791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 25097791 is about 5009.7695555784. The cubic root of 25097791 is about 292.7825346105.

The spelling of 25097791 in words is "twenty-five million, ninety-seven thousand, seven hundred ninety-one".