12992779 has 4 divisors (see below), whose sum is σ = 13048776. Its totient is φ = 12936784.

The previous prime is 12992761. The next prime is 12992797. The reversal of 12992779 is 97729921.

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

It is an interprime number because it is at equal distance from previous prime (12992761) and next prime (12992797).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12992779 is a prime.

It is a super-2 number, since 2×12992779² = 337624612285682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12992179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27649 + ... + 28114.

It is an arithmetic number, because the mean of its divisors is an integer number (3262194).

Almost surely, 2^12992779 is an apocalyptic number.

12992779 is a deficient number, since it is larger than the sum of its proper divisors (55997).

12992779 is an equidigital number, since it uses as much as digits as its factorization.

12992779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55996.

The product of its digits is 142884, while the sum is 46.

The square root of 12992779 is about 3604.5497638401. The cubic root of 12992779 is about 235.0899248427.

The spelling of 12992779 in words is "twelve million, nine hundred ninety-two thousand, seven hundred seventy-nine".