25183661 has 2 divisors, whose sum is σ = 25183662. Its totient is φ = 25183660.

The previous prime is 25183657. The next prime is 25183679. The reversal of 25183661 is 16638152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 2621161 = 4750^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 25183661 - 2² = 25183657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25183601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12591830 + 12591831.

It is an arithmetic number, because the mean of its divisors is an integer number (12591831).

Almost surely, 2^25183661 is an apocalyptic number.

It is an amenable number.

25183661 is a deficient number, since it is larger than the sum of its proper divisors (1).

25183661 is an equidigital number, since it uses as much as digits as its factorization.

25183661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 25183661 is about 5018.3324919738. The cubic root of 25183661 is about 293.1160648634.

The spelling of 25183661 in words is "twenty-five million, one hundred eighty-three thousand, six hundred sixty-one".