25994789 has 4 divisors (see below), whose sum is σ = 26350956. Its totient is φ = 25638624.

The previous prime is 25994783. The next prime is 25994821. The reversal of 25994789 is 98749952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10510564 + 15484225 = 3242^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 25994789 - 2¹² = 25990693 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25994789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25994783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177974 + ... + 178119.

It is an arithmetic number, because the mean of its divisors is an integer number (6587739).

Almost surely, 2^25994789 is an apocalyptic number.

It is an amenable number.

25994789 is a deficient number, since it is larger than the sum of its proper divisors (356167).

25994789 is an equidigital number, since it uses as much as digits as its factorization.

25994789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356166.

The product of its digits is 1632960, while the sum is 53.

The square root of 25994789 is about 5098.5085073970. The cubic root of 25994789 is about 296.2298137658.

The spelling of 25994789 in words is "twenty-five million, nine hundred ninety-four thousand, seven hundred eighty-nine".