25997677 has 2 divisors, whose sum is σ = 25997678. Its totient is φ = 25997676.

The previous prime is 25997639. The next prime is 25997687. The reversal of 25997677 is 77679952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25948836 + 48841 = 5094^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 25997677 - 2¹⁵ = 25964909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25997687) 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 as a sum of consecutive naturals, namely, 12998838 + 12998839.

It is an arithmetic number, because the mean of its divisors is an integer number (12998839).

Almost surely, 2^25997677 is an apocalyptic number.

It is an amenable number.

25997677 is a deficient number, since it is larger than the sum of its proper divisors (1).

25997677 is an equidigital number, since it uses as much as digits as its factorization.

25997677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 25997677 is about 5098.7917196136. The cubic root of 25997677 is about 296.2407836570.

The spelling of 25997677 in words is "twenty-five million, nine hundred ninety-seven thousand, six hundred seventy-seven".