12791947 has 4 divisors (see below), whose sum is σ = 14619376. Its totient is φ = 10964520.

The previous prime is 12791893. The next prime is 12791951. The reversal of 12791947 is 74919721.

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

It is not a de Polignac number, because 12791947 - 2⁷ = 12791819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12795947) 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, 913704 + ... + 913717.

It is an arithmetic number, because the mean of its divisors is an integer number (3654844).

Almost surely, 2^12791947 is an apocalyptic number.

12791947 is a deficient number, since it is larger than the sum of its proper divisors (1827429).

12791947 is an equidigital number, since it uses as much as digits as its factorization.

12791947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827428.

The product of its digits is 31752, while the sum is 40.

The square root of 12791947 is about 3576.5831459649. The cubic root of 12791947 is about 233.8723522764.

The spelling of 12791947 in words is "twelve million, seven hundred ninety-one thousand, nine hundred forty-seven".