25299889 has 2 divisors, whose sum is σ = 25299890. Its totient is φ = 25299888.

The previous prime is 25299877. The next prime is 25299907. The reversal of 25299889 is 98899252.

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., 25170289 + 129600 = 5017^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 25299889 - 2¹¹ = 25297841 is a prime.

It is not a weakly prime, because it can be changed into another prime (25294889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12649944 + 12649945.

It is an arithmetic number, because the mean of its divisors is an integer number (12649945).

Almost surely, 2^25299889 is an apocalyptic number.

It is an amenable number.

25299889 is a deficient number, since it is larger than the sum of its proper divisors (1).

25299889 is an equidigital number, since it uses as much as digits as its factorization.

25299889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 52.

The square root of 25299889 is about 5029.8995019781. The cubic root of 25299889 is about 293.5663041029.

The spelling of 25299889 in words is "twenty-five million, two hundred ninety-nine thousand, eight hundred eighty-nine".