189393849 has 32 divisors (see below), whose sum is σ = 293806080. Its totient is φ = 120430800.

The previous prime is 189393847. The next prime is 189393859. The reversal of 189393849 is 948393981.

It is not a de Polignac number, because 189393849 - 2¹ = 189393847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189393795 and 189393804.

It is not an unprimeable number, because it can be changed into a prime (189393847) 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 31 ways as a sum of consecutive naturals, for example, 57834 + ... + 61020.

It is an arithmetic number, because the mean of its divisors is an integer number (9181440).

Almost surely, 2^189393849 is an apocalyptic number.

It is an amenable number.

189393849 is a deficient number, since it is larger than the sum of its proper divisors (104412231).

189393849 is a wasteful number, since it uses less digits than its factorization.

189393849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3298 (or 3292 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 189393849 is about 13762.0437799042. The cubic root of 189393849 is about 574.2777057885.

The spelling of 189393849 in words is "one hundred eighty-nine million, three hundred ninety-three thousand, eight hundred forty-nine".