189834843349 has 16 divisors (see below), whose sum is σ = 196823959920. Its totient is φ = 182875714560.

The previous prime is 189834843337. The next prime is 189834843403. The reversal of 189834843349 is 943348438981.

It can be written as a sum of positive squares in 8 ways, for example, as 2525062500 + 187309780849 = 50250^2 + 432793^2 .

It is a cyclic number.

It is not a de Polignac number, because 189834843349 - 2¹⁹ = 189834319061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189834843949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34060527 + ... + 34066099.

It is an arithmetic number, because the mean of its divisors is an integer number (12301497495).

Almost surely, 2^189834843349 is an apocalyptic number.

It is an amenable number.

189834843349 is a deficient number, since it is larger than the sum of its proper divisors (6989116571).

189834843349 is a wasteful number, since it uses less digits than its factorization.

189834843349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040.

The product of its digits is 71663616, while the sum is 64.

The spelling of 189834843349 in words is "one hundred eighty-nine billion, eight hundred thirty-four million, eight hundred forty-three thousand, three hundred forty-nine".