204131099 has 2 divisors, whose sum is σ = 204131100. Its totient is φ = 204131098.

The previous prime is 204131089. The next prime is 204131129. The reversal of 204131099 is 990131402.

It is a happy number.

204131099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204131099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204131009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102065549 + 102065550.

It is an arithmetic number, because the mean of its divisors is an integer number (102065550).

Almost surely, 2^204131099 is an apocalyptic number.

204131099 is a deficient number, since it is larger than the sum of its proper divisors (1).

204131099 is an equidigital number, since it uses as much as digits as its factorization.

204131099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 204131099 is about 14287.4455029582. The cubic root of 204131099 is about 588.8026074703.

It can be divided in two parts, 20413 and 1099, that added together give a palindrome (21512).

The spelling of 204131099 in words is "two hundred four million, one hundred thirty-one thousand, ninety-nine".