12699387793 has 4 divisors (see below), whose sum is σ = 12699835060. Its totient is φ = 12698940528.

The previous prime is 12699387791. The next prime is 12699387803. The reversal of 12699387793 is 39778399621.

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 2011343104 + 10688044689 = 44848^2 + 103383^2 .

It is a cyclic number.

It is not a de Polignac number, because 12699387793 - 2¹ = 12699387791 is a prime.

It is a super-2 number, since 2×12699387793² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12699387791) 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, 177930 + ... + 238867.

It is an arithmetic number, because the mean of its divisors is an integer number (3174958765).

Almost surely, 2^12699387793 is an apocalyptic number.

It is an amenable number.

12699387793 is a deficient number, since it is larger than the sum of its proper divisors (447267).

12699387793 is an equidigital number, since it uses as much as digits as its factorization.

12699387793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447266.

The product of its digits is 30862944, while the sum is 64.

The spelling of 12699387793 in words is "twelve billion, six hundred ninety-nine million, three hundred eighty-seven thousand, seven hundred ninety-three".