189670819 has 8 divisors (see below), whose sum is σ = 216276480. Its totient is φ = 164781696.

The previous prime is 189670753. The next prime is 189670823. The reversal of 189670819 is 918076981.

189670819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189670819 - 2¹⁷ = 189539747 is a prime.

It is a super-2 number, since 2×189670819² = 71950039160261522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189670849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428899 + ... + 429340.

It is an arithmetic number, because the mean of its divisors is an integer number (27034560).

Almost surely, 2^189670819 is an apocalyptic number.

189670819 is a deficient number, since it is larger than the sum of its proper divisors (26605661).

189670819 is a wasteful number, since it uses less digits than its factorization.

189670819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858269.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 189670819 is about 13772.1029258425. The cubic root of 189670819 is about 574.5575111156.

The spelling of 189670819 in words is "one hundred eighty-nine million, six hundred seventy thousand, eight hundred nineteen".