25980993 has 20 divisors (see below), whose sum is σ = 39864660. Its totient is φ = 16850592.

The previous prime is 25980953. The next prime is 25981001. The reversal of 25980993 is 39908952.

It can be written as a sum of positive squares in 2 ways, for example, as 18045504 + 7935489 = 4248^2 + 2817^2 .

It is not a de Polignac number, because 25980993 - 2¹⁷ = 25849921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25980953) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1338 + ... + 7331.

It is an arithmetic number, because the mean of its divisors is an integer number (1993233).

Almost surely, 2^25980993 is an apocalyptic number.

It is an amenable number.

25980993 is a deficient number, since it is larger than the sum of its proper divisors (13883667).

25980993 is an equidigital number, since it uses as much as digits as its factorization.

25980993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8718 (or 8709 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 25980993 is about 5097.1553831525. The cubic root of 25980993 is about 296.1773992901.

The spelling of 25980993 in words is "twenty-five million, nine hundred eighty thousand, nine hundred ninety-three".