204220787 has 2 divisors, whose sum is σ = 204220788. Its totient is φ = 204220786.

The previous prime is 204220729. The next prime is 204220789. The reversal of 204220787 is 787022402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204220787 is a prime.

It is a super-2 number, since 2×204220787² = 83412259685798738, which contains 22 as substring.

Together with 204220789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204220789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102110393 + 102110394.

It is an arithmetic number, because the mean of its divisors is an integer number (102110394).

Almost surely, 2^204220787 is an apocalyptic number.

204220787 is a deficient number, since it is larger than the sum of its proper divisors (1).

204220787 is an equidigital number, since it uses as much as digits as its factorization.

204220787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 204220787 is about 14290.5838579115. The cubic root of 204220787 is about 588.8888278720. Note that the first 4 decimals are identical.

The spelling of 204220787 in words is "two hundred four million, two hundred twenty thousand, seven hundred eighty-seven".