199982473 has 2 divisors, whose sum is σ = 199982474. Its totient is φ = 199982472.

The previous prime is 199982449. The next prime is 199982479. The reversal of 199982473 is 374289991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183115024 + 16867449 = 13532^2 + 4107^2 .

It is an emirp because it is prime and its reverse (374289991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199982473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199982473.

It is not a weakly prime, because it can be changed into another prime (199982479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99991236 + 99991237.

It is an arithmetic number, because the mean of its divisors is an integer number (99991237).

Almost surely, 2^199982473 is an apocalyptic number.

It is an amenable number.

199982473 is a deficient number, since it is larger than the sum of its proper divisors (1).

199982473 is an equidigital number, since it uses as much as digits as its factorization.

199982473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 52.

The square root of 199982473 is about 14141.5159371264. The cubic root of 199982473 is about 584.7864640572.

The spelling of 199982473 in words is "one hundred ninety-nine million, nine hundred eighty-two thousand, four hundred seventy-three".