12477947 has 4 divisors (see below), whose sum is σ = 12485760. Its totient is φ = 12470136.

The previous prime is 12477931. The next prime is 12477961. The reversal of 12477947 is 74977421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74977421 = 113 ⋅663517.

It is a cyclic number.

It is not a de Polignac number, because 12477947 - 2⁴ = 12477931 is a prime.

It is a super-2 number, since 2×12477947² = 311398322669618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12407947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (3121440).

Almost surely, 2^12477947 is an apocalyptic number.

12477947 is a deficient number, since it is larger than the sum of its proper divisors (7813).

12477947 is an equidigital number, since it uses as much as digits as its factorization.

12477947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7812.

The product of its digits is 98784, while the sum is 41.

The square root of 12477947 is about 3532.4137639863. The cubic root of 12477947 is about 231.9428800619.

The spelling of 12477947 in words is "twelve million, four hundred seventy-seven thousand, nine hundred forty-seven".