25289993 has 2 divisors, whose sum is σ = 25289994. Its totient is φ = 25289992.

The previous prime is 25289983. The next prime is 25290019. The reversal of 25289993 is 39998252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22202944 + 3087049 = 4712^2 + 1757^2 .

It is a cyclic number.

It is not a de Polignac number, because 25289993 - 2¹⁰ = 25288969 is a prime.

It is not a weakly prime, because it can be changed into another prime (25289983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12644996 + 12644997.

It is an arithmetic number, because the mean of its divisors is an integer number (12644997).

Almost surely, 2^25289993 is an apocalyptic number.

It is an amenable number.

25289993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25289993 is an equidigital number, since it uses as much as digits as its factorization.

25289993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 47.

The square root of 25289993 is about 5028.9156882970. The cubic root of 25289993 is about 293.5280231575.

It can be divided in two parts, 2528 and 9993, that added together give a palindrome (12521).

The spelling of 25289993 in words is "twenty-five million, two hundred eighty-nine thousand, nine hundred ninety-three".