12640193 has 2 divisors, whose sum is σ = 12640194. Its totient is φ = 12640192.

The previous prime is 12640171. The next prime is 12640207. The reversal of 12640193 is 39104621.

12640193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12623809 + 16384 = 3553^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 12640193 - 2¹² = 12636097 is a prime.

It is not a weakly prime, because it can be changed into another prime (12640123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320096 + 6320097.

It is an arithmetic number, because the mean of its divisors is an integer number (6320097).

Almost surely, 2^12640193 is an apocalyptic number.

It is an amenable number.

12640193 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640193 is an equidigital number, since it uses as much as digits as its factorization.

12640193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 12640193 is about 3555.3049095682. The cubic root of 12640193 is about 232.9438424958.

The spelling of 12640193 in words is "twelve million, six hundred forty thousand, one hundred ninety-three".