25163993 has 2 divisors, whose sum is σ = 25163994. Its totient is φ = 25163992.

The previous prime is 25163981. The next prime is 25164011. The reversal of 25163993 is 39936152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15904144 + 9259849 = 3988^2 + 3043^2 .

It is a cyclic number.

It is not a de Polignac number, because 25163993 - 2⁴ = 25163977 is a prime.

It is not a weakly prime, because it can be changed into another prime (25163693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12581996 + 12581997.

It is an arithmetic number, because the mean of its divisors is an integer number (12581997).

Almost surely, 2^25163993 is an apocalyptic number.

It is an amenable number.

25163993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25163993 is an equidigital number, since it uses as much as digits as its factorization.

25163993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 38.

The square root of 25163993 is about 5016.3724941436. The cubic root of 25163993 is about 293.0397388121.

The spelling of 25163993 in words is "twenty-five million, one hundred sixty-three thousand, nine hundred ninety-three".