204620774389 has 2 divisors, whose sum is σ = 204620774390. Its totient is φ = 204620774388.

The previous prime is 204620774357. The next prime is 204620774429. The reversal of 204620774389 is 983477026402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117660662289 + 86960112100 = 343017^2 + 294890^2 .

It is a cyclic number.

It is not a de Polignac number, because 204620774389 - 2⁵ = 204620774357 is a prime.

It is a super-2 number, since 2×204620774389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204620771389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102310387194 + 102310387195.

It is an arithmetic number, because the mean of its divisors is an integer number (102310387195).

Almost surely, 2^204620774389 is an apocalyptic number.

It is an amenable number.

204620774389 is a deficient number, since it is larger than the sum of its proper divisors (1).

204620774389 is an equidigital number, since it uses as much as digits as its factorization.

204620774389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 204620774389 in words is "two hundred four billion, six hundred twenty million, seven hundred seventy-four thousand, three hundred eighty-nine".