191798201 has 6 divisors (see below), whose sum is σ = 223112250. Its totient is φ = 164398416.

The previous prime is 191798183. The next prime is 191798231. The reversal of 191798201 is 102897191.

It can be written as a sum of positive squares in only one way, i.e., 157879225 + 33918976 = 12565^2 + 5824^2 .

It is not a de Polignac number, because 191798201 - 2⁶ = 191798137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191798231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1957076 + ... + 1957173.

It is an arithmetic number, because the mean of its divisors is an integer number (37185375).

Almost surely, 2^191798201 is an apocalyptic number.

It is an amenable number.

191798201 is a deficient number, since it is larger than the sum of its proper divisors (31314049).

191798201 is an equidigital number, since it uses as much as digits as its factorization.

191798201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914263 (or 3914256 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 191798201 is about 13849.1227520013. The cubic root of 191798201 is about 576.6976430211.

The spelling of 191798201 in words is "one hundred ninety-one million, seven hundred ninety-eight thousand, two hundred one".