12772779 has 4 divisors (see below), whose sum is σ = 17030376. Its totient is φ = 8515184.

The previous prime is 12772777. The next prime is 12772801. The reversal of 12772779 is 97727721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12772779 - 2¹ = 12772777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12772779.

It is not an unprimeable number, because it can be changed into a prime (12772777) 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 in 3 ways as a sum of consecutive naturals, for example, 2128794 + ... + 2128799.

It is an arithmetic number, because the mean of its divisors is an integer number (4257594).

Almost surely, 2^12772779 is an apocalyptic number.

12772779 is a deficient number, since it is larger than the sum of its proper divisors (4257597).

12772779 is an equidigital number, since it uses as much as digits as its factorization.

12772779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257596.

The product of its digits is 86436, while the sum is 42.

The square root of 12772779 is about 3573.9024888768. The cubic root of 12772779 is about 233.7554791056.

The spelling of 12772779 in words is "twelve million, seven hundred seventy-two thousand, seven hundred seventy-nine".