1243671163 has 32 divisors (see below), whose sum is σ = 1545223680. Its totient is φ = 977184000.

The previous prime is 1243671161. The next prime is 1243671199. The reversal of 1243671163 is 3611763421.

It is a cyclic number.

It is not a de Polignac number, because 1243671163 - 2¹ = 1243671161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243671161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713473 + ... + 715213.

It is an arithmetic number, because the mean of its divisors is an integer number (48288240).

Almost surely, 2^1243671163 is an apocalyptic number.

1243671163 is a deficient number, since it is larger than the sum of its proper divisors (301552517).

1243671163 is a wasteful number, since it uses less digits than its factorization.

1243671163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939.

The product of its digits is 18144, while the sum is 34.

The square root of 1243671163 is about 35265.7222101008. The cubic root of 1243671163 is about 1075.3962593239.

The spelling of 1243671163 in words is "one billion, two hundred forty-three million, six hundred seventy-one thousand, one hundred sixty-three".