12778433 has 2 divisors, whose sum is σ = 12778434. Its totient is φ = 12778432.

The previous prime is 12778427. The next prime is 12778453. The reversal of 12778433 is 33487721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8334769 + 4443664 = 2887^2 + 2108^2 .

It is a cyclic number.

It is not a de Polignac number, because 12778433 - 2⁶ = 12778369 is a prime.

It is a Chen prime.

It is equal to p₈₃₅₇₈₄ and since 12778433 and 835784 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 12778393 and 12778402.

It is not a weakly prime, because it can be changed into another prime (12778453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389216 + 6389217.

It is an arithmetic number, because the mean of its divisors is an integer number (6389217).

Almost surely, 2^12778433 is an apocalyptic number.

It is an amenable number.

12778433 is a deficient number, since it is larger than the sum of its proper divisors (1).

12778433 is an equidigital number, since it uses as much as digits as its factorization.

12778433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 12778433 is about 3574.6934134272. The cubic root of 12778433 is about 233.7899654277.

The spelling of 12778433 in words is "twelve million, seven hundred seventy-eight thousand, four hundred thirty-three".