25310993 has 2 divisors, whose sum is σ = 25310994. Its totient is φ = 25310992.

The previous prime is 25310963. The next prime is 25311001. The reversal of 25310993 is 39901352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24373969 + 937024 = 4937^2 + 968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25310993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25310963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655496 + 12655497.

It is an arithmetic number, because the mean of its divisors is an integer number (12655497).

Almost surely, 2^25310993 is an apocalyptic number.

It is an amenable number.

25310993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25310993 is an equidigital number, since it uses as much as digits as its factorization.

25310993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 25310993 is about 5031.0031802812. The cubic root of 25310993 is about 293.6092461024.

Subtracting from 25310993 its sum of digits (32), we obtain a square (25310961 = 5031²).

The spelling of 25310993 in words is "twenty-five million, three hundred ten thousand, nine hundred ninety-three".