25858993 has 2 divisors, whose sum is σ = 25858994. Its totient is φ = 25858992.

The previous prime is 25858979. The next prime is 25859027. The reversal of 25858993 is 39985852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21049744 + 4809249 = 4588^2 + 2193^2 .

It is a cyclic number.

It is not a de Polignac number, because 25858993 - 2⁵ = 25858961 is a prime.

It is not a weakly prime, because it can be changed into another prime (25858913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12929496 + 12929497.

It is an arithmetic number, because the mean of its divisors is an integer number (12929497).

Almost surely, 2^25858993 is an apocalyptic number.

It is an amenable number.

25858993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25858993 is an equidigital number, since it uses as much as digits as its factorization.

25858993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 49.

The square root of 25858993 is about 5085.1738416695. The cubic root of 25858993 is about 295.7130810249.

The spelling of 25858993 in words is "twenty-five million, eight hundred fifty-eight thousand, nine hundred ninety-three".