199109233 has 2 divisors, whose sum is σ = 199109234. Its totient is φ = 199109232.

The previous prime is 199109201. The next prime is 199109263. The reversal of 199109233 is 332901991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177875569 + 21233664 = 13337^2 + 4608^2 .

It is a cyclic number.

It is not a de Polignac number, because 199109233 - 2⁵ = 199109201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199109192 and 199109201.

It is not a weakly prime, because it can be changed into another prime (199109263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99554616 + 99554617.

It is an arithmetic number, because the mean of its divisors is an integer number (99554617).

Almost surely, 2^199109233 is an apocalyptic number.

It is an amenable number.

199109233 is a deficient number, since it is larger than the sum of its proper divisors (1).

199109233 is an equidigital number, since it uses as much as digits as its factorization.

199109233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 199109233 is about 14110.6071095471. The cubic root of 199109233 is about 583.9340493252.

The spelling of 199109233 in words is "one hundred ninety-nine million, one hundred nine thousand, two hundred thirty-three".