25873949 has 8 divisors (see below), whose sum is σ = 27640440. Its totient is φ = 24134656.

The previous prime is 25873937. The next prime is 25873961. The reversal of 25873949 is 94937852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25873937) and next prime (25873961).

It can be written as a sum of positive squares in 4 ways, for example, as 2010724 + 23863225 = 1418^2 + 4885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25873949 - 2¹⁶ = 25808413 is a prime.

It is a super-2 number, since 2×25873949² = 1338922473709202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25873979) 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 7 ways as a sum of consecutive naturals, for example, 4814 + ... + 8655.

It is an arithmetic number, because the mean of its divisors is an integer number (3455055).

Almost surely, 2^25873949 is an apocalyptic number.

It is an amenable number.

25873949 is a deficient number, since it is larger than the sum of its proper divisors (1766491).

25873949 is a wasteful number, since it uses less digits than its factorization.

25873949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13599.

The product of its digits is 544320, while the sum is 47.

The square root of 25873949 is about 5086.6441786309. The cubic root of 25873949 is about 295.7700803116.

The spelling of 25873949 in words is "twenty-five million, eight hundred seventy-three thousand, nine hundred forty-nine".