189721139229 has 12 divisors (see below), whose sum is σ = 274299459616. Its totient is φ = 126361768392.

The previous prime is 189721139203. The next prime is 189721139243. The reversal of 189721139229 is 922931127981.

189721139229 is a `hidden beast` number, since 18 + 9 + 7 + 211 + 392 + 29 = 666.

It is not a de Polignac number, because 189721139229 - 2¹⁵ = 189721106461 is a prime.

It is a super-2 number, since 2×189721139229² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189721139129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9905827 + ... + 9924960.

Almost surely, 2^189721139229 is an apocalyptic number.

It is an amenable number.

189721139229 is a deficient number, since it is larger than the sum of its proper divisors (84578320387).

189721139229 is a wasteful number, since it uses less digits than its factorization.

189721139229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19831856 (or 19831853 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The spelling of 189721139229 in words is "one hundred eighty-nine billion, seven hundred twenty-one million, one hundred thirty-nine thousand, two hundred twenty-nine".