204196091 has 6 divisors (see below), whose sum is σ = 224447076. Its totient is φ = 185632700.

The previous prime is 204196087. The next prime is 204196099. The reversal of 204196091 is 190691402.

It is not a de Polignac number, because 204196091 - 2² = 204196087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204196099) 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, 843665 + ... + 843906.

It is an arithmetic number, because the mean of its divisors is an integer number (37407846).

Almost surely, 2^204196091 is an apocalyptic number.

204196091 is a deficient number, since it is larger than the sum of its proper divisors (20250985).

204196091 is a wasteful number, since it uses less digits than its factorization.

204196091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687593 (or 1687582 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 204196091 is about 14289.7197663215. The cubic root of 204196091 is about 588.8650892100.

The spelling of 204196091 in words is "two hundred four million, one hundred ninety-six thousand, ninety-one".