204292091 has 4 divisors (see below), whose sum is σ = 204379032. Its totient is φ = 204205152.

The previous prime is 204292087. The next prime is 204292093. The reversal of 204292091 is 190292402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190292402 = 2 ⋅95146201.

It is a cyclic number.

It is not a de Polignac number, because 204292091 - 2² = 204292087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204292093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39845 + ... + 44678.

It is an arithmetic number, because the mean of its divisors is an integer number (51094758).

Almost surely, 2^204292091 is an apocalyptic number.

204292091 is a deficient number, since it is larger than the sum of its proper divisors (86941).

204292091 is an equidigital number, since it uses as much as digits as its factorization.

204292091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86940.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 204292091 is about 14293.0784297855. The cubic root of 204292091 is about 588.9573570418.

The spelling of 204292091 in words is "two hundred four million, two hundred ninety-two thousand, ninety-one".