25243993 has 2 divisors, whose sum is σ = 25243994. Its totient is φ = 25243992.

The previous prime is 25243957. The next prime is 25244003. The reversal of 25243993 is 39934252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 7198489 = 4248^2 + 2683^2 .

It is a cyclic number.

It is not a de Polignac number, because 25243993 - 2⁹ = 25243481 is a prime.

It is not a weakly prime, because it can be changed into another prime (25246993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12621996 + 12621997.

It is an arithmetic number, because the mean of its divisors is an integer number (12621997).

Almost surely, 2^25243993 is an apocalyptic number.

It is an amenable number.

25243993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25243993 is an equidigital number, since it uses as much as digits as its factorization.

25243993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 25243993 is about 5024.3400561666. The cubic root of 25243993 is about 293.3499489842.

The spelling of 25243993 in words is "twenty-five million, two hundred forty-three thousand, nine hundred ninety-three".