12631947329 has 4 divisors (see below), whose sum is σ = 12638175060. Its totient is φ = 12625719600.

The previous prime is 12631947319. The next prime is 12631947343. The reversal of 12631947329 is 92374913621.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12594001729 + 37945600 = 112223^2 + 6160^2 .

It is a cyclic number.

It is not a de Polignac number, because 12631947329 - 2⁴ = 12631947313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12631947319) 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, 3110822 + ... + 3114879.

It is an arithmetic number, because the mean of its divisors is an integer number (3159543765).

Almost surely, 2^12631947329 is an apocalyptic number.

It is an amenable number.

12631947329 is a deficient number, since it is larger than the sum of its proper divisors (6227731).

12631947329 is an equidigital number, since it uses as much as digits as its factorization.

12631947329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6227730.

The product of its digits is 489888, while the sum is 47.

The spelling of 12631947329 in words is "twelve billion, six hundred thirty-one million, nine hundred forty-seven thousand, three hundred twenty-nine".