189977339 has 4 divisors (see below), whose sum is σ = 190012200. Its totient is φ = 189942480.

The previous prime is 189977303. The next prime is 189977341. The reversal of 189977339 is 933779981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189977339 - 2²⁰ = 188928763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189977939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7289 + ... + 20810.

It is an arithmetic number, because the mean of its divisors is an integer number (47503050).

Almost surely, 2^189977339 is an apocalyptic number.

189977339 is a deficient number, since it is larger than the sum of its proper divisors (34861).

189977339 is an equidigital number, since it uses as much as digits as its factorization.

189977339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34860.

The product of its digits is 2571912, while the sum is 56.

The square root of 189977339 is about 13783.2267267139. The cubic root of 189977339 is about 574.8668515899.

The spelling of 189977339 in words is "one hundred eighty-nine million, nine hundred seventy-seven thousand, three hundred thirty-nine".