8199213943 has 4 divisors (see below), whose sum is σ = 8199395200. Its totient is φ = 8199032688.

The previous prime is 8199213931. The next prime is 8199213947. The reversal of 8199213943 is 3493129918.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8199213943 - 2²⁵ = 8165659511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8199213947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39658 + ... + 134056.

It is an arithmetic number, because the mean of its divisors is an integer number (2049848800).

Almost surely, 2^8199213943 is an apocalyptic number.

8199213943 is a deficient number, since it is larger than the sum of its proper divisors (181257).

8199213943 is an equidigital number, since it uses as much as digits as its factorization.

8199213943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181256.

The product of its digits is 419904, while the sum is 49.

The square root of 8199213943 is about 90549.5110036493. The cubic root of 8199213943 is about 2016.4652379043.

The spelling of 8199213943 in words is "eight billion, one hundred ninety-nine million, two hundred thirteen thousand, nine hundred forty-three".