25680717 has 6 divisors (see below), whose sum is σ = 37094382. Its totient is φ = 17120472.

The previous prime is 25680691. The next prime is 25680731. The reversal of 25680717 is 71708652.

It can be written as a sum of positive squares in only one way, i.e., 17089956 + 8590761 = 4134^2 + 2931^2 .

It is not a de Polignac number, because 25680717 - 2¹² = 25676621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25680757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1426698 + ... + 1426715.

It is an arithmetic number, because the mean of its divisors is an integer number (6182397).

Almost surely, 2^25680717 is an apocalyptic number.

It is an amenable number.

25680717 is a deficient number, since it is larger than the sum of its proper divisors (11413665).

25680717 is a wasteful number, since it uses less digits than its factorization.

25680717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853419 (or 2853416 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 25680717 is about 5067.6145275662. The cubic root of 25680717 is about 295.0319490438.

The spelling of 25680717 in words is "twenty-five million, six hundred eighty thousand, seven hundred seventeen".