1243213319 has 8 divisors (see below), whose sum is σ = 1300231680. Its totient is φ = 1186442136.

The previous prime is 1243213241. The next prime is 1243213327. The reversal of 1243213319 is 9133123421.

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 1243213319 - 2⁸ = 1243213063 is a prime.

It is a super-2 number, since 2×1243213319² = 3091158713077991522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243213291 and 1243213300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243213369) 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, 51467 + ... + 71660.

It is an arithmetic number, because the mean of its divisors is an integer number (162528960).

Almost surely, 2^1243213319 is an apocalyptic number.

1243213319 is a deficient number, since it is larger than the sum of its proper divisors (57018361).

1243213319 is a wasteful number, since it uses less digits than its factorization.

1243213319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123589.

The product of its digits is 3888, while the sum is 29.

The square root of 1243213319 is about 35259.2302666975. The cubic root of 1243213319 is about 1075.2642779847.

The spelling of 1243213319 in words is "one billion, two hundred forty-three million, two hundred thirteen thousand, three hundred nineteen".