25916949 has 8 divisors (see below), whose sum is σ = 38395520. Its totient is φ = 17277948.

The previous prime is 25916941. The next prime is 25917011. The reversal of 25916949 is 94961952.

It is not a de Polignac number, because 25916949 - 2³ = 25916941 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 (25916941) 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, 479917 + ... + 479970.

It is an arithmetic number, because the mean of its divisors is an integer number (4799440).

Almost surely, 2^25916949 is an apocalyptic number.

It is an amenable number.

25916949 is a deficient number, since it is larger than the sum of its proper divisors (12478571).

25916949 is an equidigital number, since it uses as much as digits as its factorization.

25916949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959896 (or 959890 counting only the distinct ones).

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

The square root of 25916949 is about 5090.8691792267. The cubic root of 25916949 is about 295.9338367155.

The spelling of 25916949 in words is "twenty-five million, nine hundred sixteen thousand, nine hundred forty-nine".