1231713673 has 8 divisors (see below), whose sum is σ = 1244046888. Its totient is φ = 1219405824.

The previous prime is 1231713671. The next prime is 1231713709. The reversal of 1231713673 is 3763171321.

It can be written as a sum of positive squares in 4 ways, for example, as 17330569 + 1214383104 = 4163^2 + 34848^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231713673 - 2¹ = 1231713671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231713671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100065 + ... + 111697.

It is an arithmetic number, because the mean of its divisors is an integer number (155505861).

Almost surely, 2^1231713673 is an apocalyptic number.

It is an amenable number.

1231713673 is a deficient number, since it is larger than the sum of its proper divisors (12333215).

1231713673 is a wasteful number, since it uses less digits than its factorization.

1231713673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12683.

The product of its digits is 15876, while the sum is 34.

The square root of 1231713673 is about 35095.7785638102. The cubic root of 1231713673 is about 1071.9386268537.

Adding to 1231713673 its reverse (3763171321), we get a palindrome (4994884994).

The spelling of 1231713673 in words is "one billion, two hundred thirty-one million, seven hundred thirteen thousand, six hundred seventy-three".