25398091 has 2 divisors, whose sum is σ = 25398092. Its totient is φ = 25398090.

The previous prime is 25398089. The next prime is 25398103. The reversal of 25398091 is 19089352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25398091 - 2¹ = 25398089 is a prime.

Together with 25398089, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 25398091.

It is not a weakly prime, because it can be changed into another prime (25398031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12699045 + 12699046.

It is an arithmetic number, because the mean of its divisors is an integer number (12699046).

Almost surely, 2^25398091 is an apocalyptic number.

25398091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25398091 is an equidigital number, since it uses as much as digits as its factorization.

25398091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 25398091 is about 5039.6518728976. The cubic root of 25398091 is about 293.9456414533.

The spelling of 25398091 in words is "twenty-five million, three hundred ninety-eight thousand, ninety-one".