189030779 has 12 divisors (see below), whose sum is σ = 220122144. Its totient is φ = 161857584.

The previous prime is 189030763. The next prime is 189030811. The reversal of 189030779 is 977030981.

189030779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189030779 - 2⁴ = 189030763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189030719) 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, 76349 + ... + 78785.

It is an arithmetic number, because the mean of its divisors is an integer number (18343512).

Almost surely, 2^189030779 is an apocalyptic number.

189030779 is a deficient number, since it is larger than the sum of its proper divisors (31091365).

189030779 is a wasteful number, since it uses less digits than its factorization.

189030779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 189030779 is about 13748.8464607035. The cubic root of 189030779 is about 573.9105055794.

The spelling of 189030779 in words is "one hundred eighty-nine million, thirty thousand, seven hundred seventy-nine".