1799221243 has 2 divisors, whose sum is σ = 1799221244. Its totient is φ = 1799221242.

The previous prime is 1799221223. The next prime is 1799221261. The reversal of 1799221243 is 3421229971.

It is a strong prime.

It is an emirp because it is prime and its reverse (3421229971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1799221243 - 2⁵ = 1799221211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1799221196 and 1799221205.

It is not a weakly prime, because it can be changed into another prime (1799221213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899610621 + 899610622.

It is an arithmetic number, because the mean of its divisors is an integer number (899610622).

Almost surely, 2^1799221243 is an apocalyptic number.

1799221243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799221243 is an equidigital number, since it uses as much as digits as its factorization.

1799221243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 1799221243 is about 42417.2281390475. The cubic root of 1799221243 is about 1216.2649457583.

The spelling of 1799221243 in words is "one billion, seven hundred ninety-nine million, two hundred twenty-one thousand, two hundred forty-three".