1223971713 has 12 divisors (see below), whose sum is σ = 1778180820. Its totient is φ = 811263456.

The previous prime is 1223971691. The next prime is 1223971733. The reversal of 1223971713 is 3171793221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 472279824 + 751691889 = 21732^2 + 27417^2 .

It is not a de Polignac number, because 1223971713 - 2⁵ = 1223971681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223971733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391498 + ... + 394611.

It is an arithmetic number, because the mean of its divisors is an integer number (148181735).

Almost surely, 2^1223971713 is an apocalyptic number.

It is an amenable number.

1223971713 is a deficient number, since it is larger than the sum of its proper divisors (554209107).

1223971713 is a wasteful number, since it uses less digits than its factorization.

1223971713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786288 (or 786285 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 1223971713 is about 34985.3071016963. The cubic root of 1223971713 is about 1069.6880078528.

The spelling of 1223971713 in words is "one billion, two hundred twenty-three million, nine hundred seventy-one thousand, seven hundred thirteen".