204244310989 has 2 divisors, whose sum is σ = 204244310990. Its totient is φ = 204244310988.

The previous prime is 204244310987. The next prime is 204244311023. The reversal of 204244310989 is 989013442402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116830658025 + 87413652964 = 341805^2 + 295658^2 .

It is a cyclic number.

It is not a de Polignac number, because 204244310989 - 2¹ = 204244310987 is a prime.

Together with 204244310987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204244310987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102122155494 + 102122155495.

It is an arithmetic number, because the mean of its divisors is an integer number (102122155495).

Almost surely, 2^204244310989 is an apocalyptic number.

It is an amenable number.

204244310989 is a deficient number, since it is larger than the sum of its proper divisors (1).

204244310989 is an equidigital number, since it uses as much as digits as its factorization.

204244310989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 204244310989 in words is "two hundred four billion, two hundred forty-four million, three hundred ten thousand, nine hundred eighty-nine".