25328669 has 2 divisors, whose sum is σ = 25328670. Its totient is φ = 25328668.

The previous prime is 25328621. The next prime is 25328707. The reversal of 25328669 is 96682352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23396569 + 1932100 = 4837^2 + 1390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25328669 is a prime.

It is a super-2 number, since 2×25328669² = 1283082946623122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25328869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12664334 + 12664335.

It is an arithmetic number, because the mean of its divisors is an integer number (12664335).

Almost surely, 2^25328669 is an apocalyptic number.

It is an amenable number.

25328669 is a deficient number, since it is larger than the sum of its proper divisors (1).

25328669 is an equidigital number, since it uses as much as digits as its factorization.

25328669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 25328669 is about 5032.7595809854. The cubic root of 25328669 is about 293.6775778004.

The spelling of 25328669 in words is "twenty-five million, three hundred twenty-eight thousand, six hundred sixty-nine".