191938201 has 24 divisors (see below), whose sum is σ = 240330240. Its totient is φ = 150074496.

The previous prime is 191938193. The next prime is 191938213. The reversal of 191938201 is 102839191.

It is not a de Polignac number, because 191938201 - 2³ = 191938193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191938231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104376 + ... + 106198.

It is an arithmetic number, because the mean of its divisors is an integer number (10013760).

Almost surely, 2^191938201 is an apocalyptic number.

It is an amenable number.

191938201 is a deficient number, since it is larger than the sum of its proper divisors (48392039).

191938201 is a wasteful number, since it uses less digits than its factorization.

191938201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 191938201 is about 13854.1763017510. The cubic root of 191938201 is about 576.8379259385.

The spelling of 191938201 in words is "one hundred ninety-one million, nine hundred thirty-eight thousand, two hundred one".