25164817 has 2 divisors, whose sum is σ = 25164818. Its totient is φ = 25164816.

The previous prime is 25164803. The next prime is 25164827. The reversal of 25164817 is 71846152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24196561 + 968256 = 4919^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 25164817 - 2¹⁵ = 25132049 is a prime.

It is not a weakly prime, because it can be changed into another prime (25164827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12582408 + 12582409.

It is an arithmetic number, because the mean of its divisors is an integer number (12582409).

Almost surely, 2^25164817 is an apocalyptic number.

It is an amenable number.

25164817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25164817 is an equidigital number, since it uses as much as digits as its factorization.

25164817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 25164817 is about 5016.4546245331. The cubic root of 25164817 is about 293.0429373256.

The spelling of 25164817 in words is "twenty-five million, one hundred sixty-four thousand, eight hundred seventeen".