199185473 has 2 divisors, whose sum is σ = 199185474. Its totient is φ = 199185472.

The previous prime is 199185461. The next prime is 199185479. The reversal of 199185473 is 374581991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103693489 + 95491984 = 10183^2 + 9772^2 .

It is a cyclic number.

It is not a de Polignac number, because 199185473 - 2¹⁶ = 199119937 is a prime.

It is not a weakly prime, because it can be changed into another prime (199185479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99592736 + 99592737.

It is an arithmetic number, because the mean of its divisors is an integer number (99592737).

Almost surely, 2^199185473 is an apocalyptic number.

It is an amenable number.

199185473 is a deficient number, since it is larger than the sum of its proper divisors (1).

199185473 is an equidigital number, since it uses as much as digits as its factorization.

199185473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 199185473 is about 14113.3083648024. The cubic root of 199185473 is about 584.0085703143.

The spelling of 199185473 in words is "one hundred ninety-nine million, one hundred eighty-five thousand, four hundred seventy-three".