12749853947 has 4 divisors (see below), whose sum is σ = 12781649496. Its totient is φ = 12718058400.

The previous prime is 12749853943. The next prime is 12749853989. The reversal of 12749853947 is 74935894721.

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

It is a cyclic number.

It is not a de Polignac number, because 12749853947 - 2² = 12749853943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12749853943) 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, 15897173 + ... + 15897974.

It is an arithmetic number, because the mean of its divisors is an integer number (3195412374).

Almost surely, 2^12749853947 is an apocalyptic number.

12749853947 is a deficient number, since it is larger than the sum of its proper divisors (31795549).

12749853947 is an equidigital number, since it uses as much as digits as its factorization.

12749853947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31795548.

The product of its digits is 15240960, while the sum is 59.

The spelling of 12749853947 in words is "twelve billion, seven hundred forty-nine million, eight hundred fifty-three thousand, nine hundred forty-seven".