25299997 has 2 divisors, whose sum is σ = 25299998. Its totient is φ = 25299996.

The previous prime is 25299991. The next prime is 25300003. The reversal of 25299997 is 79999252.

It is a balanced prime because it is at equal distance from previous prime (25299991) and next prime (25300003).

It can be written as a sum of positive squares in only one way, i.e., 15634116 + 9665881 = 3954^2 + 3109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25299997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25299991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12649998 + 12649999.

It is an arithmetic number, because the mean of its divisors is an integer number (12649999).

Almost surely, 2^25299997 is an apocalyptic number.

It is an amenable number.

25299997 is a deficient number, since it is larger than the sum of its proper divisors (1).

25299997 is an equidigital number, since it uses as much as digits as its factorization.

25299997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 52.

The square root of 25299997 is about 5029.9102377677. The cubic root of 25299997 is about 293.5667218269.

The spelling of 25299997 in words is "twenty-five million, two hundred ninety-nine thousand, nine hundred ninety-seven".