25664629 has 2 divisors, whose sum is σ = 25664630. Its totient is φ = 25664628.

The previous prime is 25664599. The next prime is 25664657. The reversal of 25664629 is 92646652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25654225 + 10404 = 5065^2 + 102^2 .

It is a cyclic number.

It is not a de Polignac number, because 25664629 - 2²¹ = 23567477 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25664591 and 25664600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25664669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832314 + 12832315.

It is an arithmetic number, because the mean of its divisors is an integer number (12832315).

Almost surely, 2^25664629 is an apocalyptic number.

It is an amenable number.

25664629 is a deficient number, since it is larger than the sum of its proper divisors (1).

25664629 is an equidigital number, since it uses as much as digits as its factorization.

25664629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 25664629 is about 5066.0269442631. The cubic root of 25664629 is about 294.9703273803.

The spelling of 25664629 in words is "twenty-five million, six hundred sixty-four thousand, six hundred twenty-nine".