25945999 has 2 divisors, whose sum is σ = 25946000. Its totient is φ = 25945998.

The previous prime is 25945979. The next prime is 25946003. The reversal of 25945999 is 99954952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25945999 - 2¹⁵ = 25913231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25945919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12972999 + 12973000.

It is an arithmetic number, because the mean of its divisors is an integer number (12973000).

Almost surely, 2^25945999 is an apocalyptic number.

25945999 is a deficient number, since it is larger than the sum of its proper divisors (1).

25945999 is an equidigital number, since it uses as much as digits as its factorization.

25945999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1312200, while the sum is 52.

The square root of 25945999 is about 5093.7215275278. The cubic root of 25945999 is about 296.0443650022.

The spelling of 25945999 in words is "twenty-five million, nine hundred forty-five thousand, nine hundred ninety-nine".