204158789 has 2 divisors, whose sum is σ = 204158790. Its totient is φ = 204158788.

The previous prime is 204158771. The next prime is 204158827. The reversal of 204158789 is 987851402.

204158789 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 can be written as a sum of positive squares in only one way, i.e., 194825764 + 9333025 = 13958^2 + 3055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204158789 is a prime.

It is a super-2 number, since 2×204158789² = 83361622251893042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204158719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102079394 + 102079395.

It is an arithmetic number, because the mean of its divisors is an integer number (102079395).

Almost surely, 2^204158789 is an apocalyptic number.

It is an amenable number.

204158789 is a deficient number, since it is larger than the sum of its proper divisors (1).

204158789 is an equidigital number, since it uses as much as digits as its factorization.

204158789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 204158789 is about 14288.4145026661. The cubic root of 204158789 is about 588.8292295890.

The spelling of 204158789 in words is "two hundred four million, one hundred fifty-eight thousand, seven hundred eighty-nine".