12779019 has 32 divisors (see below), whose sum is σ = 21876480. Its totient is φ = 7286400.

The previous prime is 12779017. The next prime is 12779021. The reversal of 12779019 is 91097721.

It is an interprime number because it is at equal distance from previous prime (12779017) and next prime (12779021).

It is not a de Polignac number, because 12779019 - 2¹ = 12779017 is a prime.

It is a super-2 number, since 2×12779019² = 326606653204722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12779017) 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 31 ways as a sum of consecutive naturals, for example, 3784 + ... + 6314.

It is an arithmetic number, because the mean of its divisors is an integer number (683640).

Almost surely, 2^12779019 is an apocalyptic number.

12779019 is a deficient number, since it is larger than the sum of its proper divisors (9097461).

12779019 is a wasteful number, since it uses less digits than its factorization.

12779019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 12779019 is about 3574.7753775587. The cubic root of 12779019 is about 233.7935391268.

It can be divided in two parts, 1277 and 9019, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 12779019 in words is "twelve million, seven hundred seventy-nine thousand, nineteen".