189738133 has 4 divisors (see below), whose sum is σ = 204333388. Its totient is φ = 175142880.

The previous prime is 189738103. The next prime is 189738149. The reversal of 189738133 is 331837981.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70862724 + 118875409 = 8418^2 + 10903^2 .

It is a cyclic number.

It is not a de Polignac number, because 189738133 - 2¹³ = 189729941 is a prime.

It is a super-2 number, since 2×189738133² = 72001118228651378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189738133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189738103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7297608 + ... + 7297633.

It is an arithmetic number, because the mean of its divisors is an integer number (51083347).

Almost surely, 2^189738133 is an apocalyptic number.

189738133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

189738133 is a deficient number, since it is larger than the sum of its proper divisors (14595255).

189738133 is a wasteful number, since it uses less digits than its factorization.

189738133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14595254.

The product of its digits is 108864, while the sum is 43.

The square root of 189738133 is about 13774.5465624100. The cubic root of 189738133 is about 574.6254730546.

The spelling of 189738133 in words is "one hundred eighty-nine million, seven hundred thirty-eight thousand, one hundred thirty-three".