25353661 has 2 divisors, whose sum is σ = 25353662. Its totient is φ = 25353660.

The previous prime is 25353649. The next prime is 25353667. The reversal of 25353661 is 16635352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20985561 + 4368100 = 4581^2 + 2090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25353661 is a prime.

It is a super-2 number, since 2×25353661² = 1285616252205842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25353667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12676830 + 12676831.

It is an arithmetic number, because the mean of its divisors is an integer number (12676831).

Almost surely, 2^25353661 is an apocalyptic number.

It is an amenable number.

25353661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25353661 is an equidigital number, since it uses as much as digits as its factorization.

25353661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 25353661 is about 5035.2419008425. The cubic root of 25353661 is about 293.7741373858.

The spelling of 25353661 in words is "twenty-five million, three hundred fifty-three thousand, six hundred sixty-one".