25192891 has 2 divisors, whose sum is σ = 25192892. Its totient is φ = 25192890.

The previous prime is 25192877. The next prime is 25192913. The reversal of 25192891 is 19829152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25192891 - 2⁷ = 25192763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25192891.

It is not a weakly prime, because it can be changed into another prime (25192091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12596445 + 12596446.

It is an arithmetic number, because the mean of its divisors is an integer number (12596446).

Almost surely, 2^25192891 is an apocalyptic number.

25192891 is a deficient number, since it is larger than the sum of its proper divisors (1).

25192891 is an equidigital number, since it uses as much as digits as its factorization.

25192891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 37.

The square root of 25192891 is about 5019.2520359113. The cubic root of 25192891 is about 293.1518702324.

The spelling of 25192891 in words is "twenty-five million, one hundred ninety-two thousand, eight hundred ninety-one".