199971433 has 2 divisors, whose sum is σ = 199971434. Its totient is φ = 199971432.

The previous prime is 199971427. The next prime is 199971439. The reversal of 199971433 is 334179991.

It is a balanced prime because it is at equal distance from previous prime (199971427) and next prime (199971439).

It can be written as a sum of positive squares in only one way, i.e., 139877929 + 60093504 = 11827^2 + 7752^2 .

It is an emirp because it is prime and its reverse (334179991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199971433 - 2²⁵ = 166417001 is a prime.

It is not a weakly prime, because it can be changed into another prime (199971439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99985716 + 99985717.

It is an arithmetic number, because the mean of its divisors is an integer number (99985717).

Almost surely, 2^199971433 is an apocalyptic number.

It is an amenable number.

199971433 is a deficient number, since it is larger than the sum of its proper divisors (1).

199971433 is an equidigital number, since it uses as much as digits as its factorization.

199971433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 46.

The square root of 199971433 is about 14141.1255916918. The cubic root of 199971433 is about 584.7757028452.

The spelling of 199971433 in words is "one hundred ninety-nine million, nine hundred seventy-one thousand, four hundred thirty-three".