25860091 has 2 divisors, whose sum is σ = 25860092. Its totient is φ = 25860090.

The previous prime is 25860049. The next prime is 25860127. The reversal of 25860091 is 19006852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25860091 - 2⁹ = 25859579 is a prime.

It is not a weakly prime, because it can be changed into another prime (25860391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12930045 + 12930046.

It is an arithmetic number, because the mean of its divisors is an integer number (12930046).

Almost surely, 2^25860091 is an apocalyptic number.

25860091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25860091 is an equidigital number, since it uses as much as digits as its factorization.

25860091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 25860091 is about 5085.2818014344. The cubic root of 25860091 is about 295.7172663950.

The spelling of 25860091 in words is "twenty-five million, eight hundred sixty thousand, ninety-one".