25502993 has 2 divisors, whose sum is σ = 25502994. Its totient is φ = 25502992.

The previous prime is 25502957. The next prime is 25503011. The reversal of 25502993 is 39920552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24275329 + 1227664 = 4927^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 25502993 - 2¹² = 25498897 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25502293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751496 + 12751497.

It is an arithmetic number, because the mean of its divisors is an integer number (12751497).

Almost surely, 2^25502993 is an apocalyptic number.

It is an amenable number.

25502993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25502993 is an equidigital number, since it uses as much as digits as its factorization.

25502993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 25502993 is about 5050.0488116453. The cubic root of 25502993 is about 294.3497811378.

The spelling of 25502993 in words is "twenty-five million, five hundred two thousand, nine hundred ninety-three".