25916969 has 16 divisors (see below), whose sum is σ = 29561280. Its totient is φ = 22524480.

The previous prime is 25916941. The next prime is 25917011. The reversal of 25916969 is 96961952.

25916969 = 98² + 99² + ... + 428².

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25916969 is a prime.

It is a super-2 number, since 2×25916969² = 1343378564293922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25916939) 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 15 ways as a sum of consecutive naturals, for example, 78134 + ... + 78464.

It is an arithmetic number, because the mean of its divisors is an integer number (1847580).

Almost surely, 2^25916969 is an apocalyptic number.

It is an amenable number.

25916969 is a deficient number, since it is larger than the sum of its proper divisors (3644311).

25916969 is a wasteful number, since it uses less digits than its factorization.

25916969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its digits is 262440, while the sum is 47.

The square root of 25916969 is about 5090.8711435274. The cubic root of 25916969 is about 295.9339128391.

The spelling of 25916969 in words is "twenty-five million, nine hundred sixteen thousand, nine hundred sixty-nine".