25293091 has 4 divisors (see below), whose sum is σ = 25383384. Its totient is φ = 25202800.

The previous prime is 25293071. The next prime is 25293109. The reversal of 25293091 is 19039252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25293091 - 2¹⁷ = 25162019 is a prime.

It is a Duffinian number.

25293091 is a modest number, since divided by 3091 gives 2529 as remainder.

It is not an unprimeable number, because it can be changed into a prime (25293001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44725 + ... + 45286.

It is an arithmetic number, because the mean of its divisors is an integer number (6345846).

Almost surely, 2^25293091 is an apocalyptic number.

25293091 is a deficient number, since it is larger than the sum of its proper divisors (90293).

25293091 is an equidigital number, since it uses as much as digits as its factorization.

25293091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90292.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25293091 is about 5029.2236975501. The cubic root of 25293091 is about 293.5400083024.

The spelling of 25293091 in words is "twenty-five million, two hundred ninety-three thousand, ninety-one".