189412919 has 4 divisors (see below), whose sum is σ = 199382040. Its totient is φ = 179443800.

The previous prime is 189412913. The next prime is 189412921. The reversal of 189412919 is 919214981.

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 189412919 - 2¹² = 189408823 is a prime.

It is a super-2 number, since 2×189412919² = 71754507768201122, 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 189412919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189412913) 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, 4984532 + ... + 4984569.

It is an arithmetic number, because the mean of its divisors is an integer number (49845510).

Almost surely, 2^189412919 is an apocalyptic number.

189412919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

189412919 is a deficient number, since it is larger than the sum of its proper divisors (9969121).

189412919 is an equidigital number, since it uses as much as digits as its factorization.

189412919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9969120.

The product of its digits is 46656, while the sum is 44.

The square root of 189412919 is about 13762.7366101368. The cubic root of 189412919 is about 574.2969797483.

The spelling of 189412919 in words is "one hundred eighty-nine million, four hundred twelve thousand, nine hundred nineteen".