189899807029 has 4 divisors (see below), whose sum is σ = 195032234284. Its totient is φ = 184767379776.

The previous prime is 189899807021. The next prime is 189899807039. The reversal of 189899807029 is 920708998981.

189899807029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 920708998981 = 504677 ⋅1824353.

It can be written as a sum of positive squares in 2 ways, for example, as 75077096004 + 114822711025 = 274002^2 + 338855^2 .

It is a cyclic number.

It is not a de Polignac number, because 189899807029 - 2³ = 189899807021 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 (189899807021) 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 3 ways as a sum of consecutive naturals, for example, 2566213572 + ... + 2566213645.

It is an arithmetic number, because the mean of its divisors is an integer number (48758058571).

Almost surely, 2^189899807029 is an apocalyptic number.

It is an amenable number.

189899807029 is a deficient number, since it is larger than the sum of its proper divisors (5132427255).

189899807029 is an equidigital number, since it uses as much as digits as its factorization.

189899807029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132427254.

The product of its (nonzero) digits is 47029248, while the sum is 70.

The spelling of 189899807029 in words is "one hundred eighty-nine billion, eight hundred ninety-nine million, eight hundred seven thousand, twenty-nine".