189393039 has 32 divisors (see below), whose sum is σ = 324103680. Its totient is φ = 108028800.

The previous prime is 189393031. The next prime is 189393049. The reversal of 189393039 is 930393981.

It is not a de Polignac number, because 189393039 - 2³ = 189393031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189392985 and 189393003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189393031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13707 + ... + 23804.

It is an arithmetic number, because the mean of its divisors is an integer number (10128240).

Almost surely, 2^189393039 is an apocalyptic number.

189393039 is a deficient number, since it is larger than the sum of its proper divisors (134710641).

189393039 is a wasteful number, since it uses less digits than its factorization.

189393039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37548 (or 37542 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 189393039 is about 13762.0143511043. The cubic root of 189393039 is about 574.2768870966.

The spelling of 189393039 in words is "one hundred eighty-nine million, three hundred ninety-three thousand, thirty-nine".