189898107529 has 9 divisors (see below), whose sum is σ = 205635446229. Its totient is φ = 175285331520.

The previous prime is 189898107523. The next prime is 189898107563. The reversal of 189898107529 is 925701898981.

The square root of 189898107529 is 435773.

It is a perfect power (a square), and thus also a powerful number.

189898107529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 64193823225 + 125704284304 = 253365^2 + 354548^2 .

It is not a de Polignac number, because 189898107529 - 2⁹ = 189898107017 is a prime.

It is a super-2 number, since 2×189898107529² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189898107523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5648289 + ... + 5681809.

Almost surely, 2^189898107529 is an apocalyptic number.

189898107529 is the 435773-rd square number.

189898107529 is the 217887-th centered octagonal number.

It is an amenable number.

189898107529 is a deficient number, since it is larger than the sum of its proper divisors (15737338700).

189898107529 is an frugal number, since it uses more digits than its factorization.

189898107529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67068 (or 33534 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 67.

The spelling of 189898107529 in words is "one hundred eighty-nine billion, eight hundred ninety-eight million, one hundred seven thousand, five hundred twenty-nine".