189894379 has 4 divisors (see below), whose sum is σ = 199888840. Its totient is φ = 179899920.

The previous prime is 189894319. The next prime is 189894421. The reversal of 189894379 is 973498981.

189894379 = T₁₁₂₅₀ + T₁₁₂₅₁ + T₁₁₂₅₂.

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 189894379 - 2¹⁹ = 189370091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189894319) 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, 4997202 + ... + 4997239.

It is an arithmetic number, because the mean of its divisors is an integer number (49972210).

Almost surely, 2^189894379 is an apocalyptic number.

189894379 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

189894379 is the 11252-nd centered triangular number.

189894379 is a deficient number, since it is larger than the sum of its proper divisors (9994461).

189894379 is an equidigital number, since it uses as much as digits as its factorization.

189894379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9994460.

The product of its digits is 3919104, while the sum is 58.

The square root of 189894379 is about 13780.2169431399. The cubic root of 189894379 is about 574.7831610860.

The spelling of 189894379 in words is "one hundred eighty-nine million, eight hundred ninety-four thousand, three hundred seventy-nine".