204742819 has 2 divisors, whose sum is σ = 204742820. Its totient is φ = 204742818.

The previous prime is 204742787. The next prime is 204742831. The reversal of 204742819 is 918247402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204742819 - 2⁵ = 204742787 is a prime.

It is a super-2 number, since 2×204742819² = 83839243864133522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204742019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102371409 + 102371410.

It is an arithmetic number, because the mean of its divisors is an integer number (102371410).

Almost surely, 2^204742819 is an apocalyptic number.

204742819 is a deficient number, since it is larger than the sum of its proper divisors (1).

204742819 is an equidigital number, since it uses as much as digits as its factorization.

204742819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 204742819 is about 14308.8370946070. The cubic root of 204742819 is about 589.3901761852.

The spelling of 204742819 in words is "two hundred four million, seven hundred forty-two thousand, eight hundred nineteen".