204088391 has 4 divisors (see below), whose sum is σ = 219787512. Its totient is φ = 188389272.

The previous prime is 204088387. The next prime is 204088403. The reversal of 204088391 is 193880402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 204088391 - 2² = 204088387 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 (204088091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7849541 + ... + 7849566.

It is an arithmetic number, because the mean of its divisors is an integer number (54946878).

Almost surely, 2^204088391 is an apocalyptic number.

204088391 is a deficient number, since it is larger than the sum of its proper divisors (15699121).

204088391 is a wasteful number, since it uses less digits than its factorization.

204088391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15699120.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 204088391 is about 14285.9508258988. The cubic root of 204088391 is about 588.7615418091.

The spelling of 204088391 in words is "two hundred four million, eighty-eight thousand, three hundred ninety-one".