25873813 has 24 divisors (see below), whose sum is σ = 32319000. Its totient is φ = 20579328.

The previous prime is 25873759. The next prime is 25873879. The reversal of 25873813 is 31837852.

It can be written as a sum of positive squares in 4 ways, for example, as 5866084 + 20007729 = 2422^2 + 4473^2 .

It is not a de Polignac number, because 25873813 - 2⁹ = 25873301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25873013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73963 + ... + 74311.

It is an arithmetic number, because the mean of its divisors is an integer number (1346625).

Almost surely, 2^25873813 is an apocalyptic number.

It is an amenable number.

25873813 is a deficient number, since it is larger than the sum of its proper divisors (6445187).

25873813 is a wasteful number, since it uses less digits than its factorization.

25873813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 462 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 25873813 is about 5086.6308102712. The cubic root of 25873813 is about 295.7695620967.

It can be divided in two parts, 2587 and 3813, that added together give a square (6400 = 80²).

The spelling of 25873813 in words is "twenty-five million, eight hundred seventy-three thousand, eight hundred thirteen".