189383491 has 4 divisors (see below), whose sum is σ = 206600184. Its totient is φ = 172166800.

The previous prime is 189383489. The next prime is 189383521. The reversal of 189383491 is 194383981.

It is a happy number.

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 189383491 - 2¹ = 189383489 is a prime.

It is a super-3 number, since 3×189383491³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189383401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8608330 + ... + 8608351.

It is an arithmetic number, because the mean of its divisors is an integer number (51650046).

Almost surely, 2^189383491 is an apocalyptic number.

189383491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189383491 is a deficient number, since it is larger than the sum of its proper divisors (17216693).

189383491 is a wasteful number, since it uses less digits than its factorization.

189383491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17216692.

The product of its digits is 186624, while the sum is 46.

The square root of 189383491 is about 13761.6674498405. The cubic root of 189383491 is about 574.2672364641.

The spelling of 189383491 in words is "one hundred eighty-nine million, three hundred eighty-three thousand, four hundred ninety-one".