12776947 has 4 divisors (see below), whose sum is σ = 12956976. Its totient is φ = 12596920.

The previous prime is 12776941. The next prime is 12776957. The reversal of 12776947 is 74967721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74967721 = 41 ⋅1828481.

It is a cyclic number.

It is not a de Polignac number, because 12776947 - 2¹⁹ = 12252659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12776941) 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, 89908 + ... + 90049.

It is an arithmetic number, because the mean of its divisors is an integer number (3239244).

Almost surely, 2^12776947 is an apocalyptic number.

12776947 is a deficient number, since it is larger than the sum of its proper divisors (180029).

12776947 is an equidigital number, since it uses as much as digits as its factorization.

12776947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180028.

The product of its digits is 148176, while the sum is 43.

The square root of 12776947 is about 3574.4855573914. The cubic root of 12776947 is about 233.7809026222.

The spelling of 12776947 in words is "twelve million, seven hundred seventy-six thousand, nine hundred forty-seven".