12539893 has 2 divisors, whose sum is σ = 12539894. Its totient is φ = 12539892.

The previous prime is 12539881. The next prime is 12539909. The reversal of 12539893 is 39893521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11573604 + 966289 = 3402^2 + 983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12539893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12539843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6269946 + 6269947.

It is an arithmetic number, because the mean of its divisors is an integer number (6269947).

Almost surely, 2^12539893 is an apocalyptic number.

It is an amenable number.

12539893 is a deficient number, since it is larger than the sum of its proper divisors (1).

12539893 is an equidigital number, since it uses as much as digits as its factorization.

12539893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 12539893 is about 3541.1711339612. The cubic root of 12539893 is about 232.3260687057.

The spelling of 12539893 in words is "twelve million, five hundred thirty-nine thousand, eight hundred ninety-three".