25161797 has 2 divisors, whose sum is σ = 25161798. Its totient is φ = 25161796.

The previous prime is 25161781. The next prime is 25161809. The reversal of 25161797 is 79716152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 101761 = 5006^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 25161797 - 2⁴ = 25161781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25161797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25161727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12580898 + 12580899.

It is an arithmetic number, because the mean of its divisors is an integer number (12580899).

Almost surely, 2^25161797 is an apocalyptic number.

It is an amenable number.

25161797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25161797 is an equidigital number, since it uses as much as digits as its factorization.

25161797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 25161797 is about 5016.1536061010. The cubic root of 25161797 is about 293.0312142775.

The spelling of 25161797 in words is "twenty-five million, one hundred sixty-one thousand, seven hundred ninety-seven".