25299929 has 2 divisors, whose sum is σ = 25299930. Its totient is φ = 25299928.

The previous prime is 25299913. The next prime is 25299949. The reversal of 25299929 is 92999252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17205904 + 8094025 = 4148^2 + 2845^2 .

It is a cyclic number.

It is not a de Polignac number, because 25299929 - 2⁴ = 25299913 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25299949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12649964 + 12649965.

It is an arithmetic number, because the mean of its divisors is an integer number (12649965).

Almost surely, 2^25299929 is an apocalyptic number.

It is an amenable number.

25299929 is a deficient number, since it is larger than the sum of its proper divisors (1).

25299929 is an equidigital number, since it uses as much as digits as its factorization.

25299929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 47.

The square root of 25299929 is about 5029.9034781992. The cubic root of 25299929 is about 293.5664588156.

The spelling of 25299929 in words is "twenty-five million, two hundred ninety-nine thousand, nine hundred twenty-nine".