12779539 has 2 divisors, whose sum is σ = 12779540. Its totient is φ = 12779538.

The previous prime is 12779531. The next prime is 12779567. The reversal of 12779539 is 93597721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12779539 - 2³ = 12779531 is a prime.

It is a super-3 number, since 3×12779539³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12779495 and 12779504.

It is not a weakly prime, because it can be changed into another prime (12779531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6389769 + 6389770.

It is an arithmetic number, because the mean of its divisors is an integer number (6389770).

Almost surely, 2^12779539 is an apocalyptic number.

12779539 is a deficient number, since it is larger than the sum of its proper divisors (1).

12779539 is an equidigital number, since it uses as much as digits as its factorization.

12779539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 43.

The square root of 12779539 is about 3574.8481086614. The cubic root of 12779539 is about 233.7967102359.

It can be divided in two parts, 1277 and 9539, that added together give a square (10816 = 104²).

The spelling of 12779539 in words is "twelve million, seven hundred seventy-nine thousand, five hundred thirty-nine".