204426619 has 2 divisors, whose sum is σ = 204426620. Its totient is φ = 204426618.

The previous prime is 204426589. The next prime is 204426623. The reversal of 204426619 is 916624402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204426619 - 2⁵ = 204426587 is a prime.

It is a super-2 number, since 2×204426619² = 83580485111542322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (204426689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102213309 + 102213310.

It is an arithmetic number, because the mean of its divisors is an integer number (102213310).

Almost surely, 2^204426619 is an apocalyptic number.

204426619 is a deficient number, since it is larger than the sum of its proper divisors (1).

204426619 is an equidigital number, since it uses as much as digits as its factorization.

204426619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 204426619 is about 14297.7837093726. The cubic root of 204426619 is about 589.0866064086.

The spelling of 204426619 in words is "two hundred four million, four hundred twenty-six thousand, six hundred nineteen".