191340833 has 4 divisors (see below), whose sum is σ = 193490820. Its totient is φ = 189190848.

The previous prime is 191340829. The next prime is 191340847. The reversal of 191340833 is 338043191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122500624 + 68840209 = 11068^2 + 8297^2 .

It is a cyclic number.

It is not a de Polignac number, because 191340833 - 2² = 191340829 is a prime.

It is a super-2 number, since 2×191340833² = 73222628746267778, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191340833.

It is not an unprimeable number, because it can be changed into a prime (191340893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074860 + ... + 1075037.

It is an arithmetic number, because the mean of its divisors is an integer number (48372705).

Almost surely, 2^191340833 is an apocalyptic number.

It is an amenable number.

191340833 is a deficient number, since it is larger than the sum of its proper divisors (2149987).

191340833 is an equidigital number, since it uses as much as digits as its factorization.

191340833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149986.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 191340833 is about 13832.6003701401. The cubic root of 191340833 is about 576.2388744062.

The spelling of 191340833 in words is "one hundred ninety-one million, three hundred forty thousand, eight hundred thirty-three".