25945813 has 4 divisors (see below), whose sum is σ = 26549248. Its totient is φ = 25342380.

The previous prime is 25945783. The next prime is 25945823. The reversal of 25945813 is 31854952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25945813 - 2²¹ = 23848661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25945823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301653 + ... + 301738.

It is an arithmetic number, because the mean of its divisors is an integer number (6637312).

Almost surely, 2^25945813 is an apocalyptic number.

It is an amenable number.

25945813 is a deficient number, since it is larger than the sum of its proper divisors (603435).

25945813 is an equidigital number, since it uses as much as digits as its factorization.

25945813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603434.

The product of its digits is 43200, while the sum is 37.

The square root of 25945813 is about 5093.7032697243. The cubic root of 25945813 is about 296.0436575793.

The spelling of 25945813 in words is "twenty-five million, nine hundred forty-five thousand, eight hundred thirteen".