189446719 has 16 divisors (see below), whose sum is σ = 237712896. Its totient is φ = 146671200.

The previous prime is 189446713. The next prime is 189446729. The reversal of 189446719 is 917644981.

It is a cyclic number.

It is not a de Polignac number, because 189446719 - 2³ = 189446711 is a prime.

It is a super-2 number, since 2×189446719² = 71780118679729922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189446711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4254 + ... + 19924.

It is an arithmetic number, because the mean of its divisors is an integer number (14857056).

Almost surely, 2^189446719 is an apocalyptic number.

189446719 is a deficient number, since it is larger than the sum of its proper divisors (48266177).

189446719 is a wasteful number, since it uses less digits than its factorization.

189446719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15846.

The product of its digits is 435456, while the sum is 49.

The square root of 189446719 is about 13763.9645088179. The cubic root of 189446719 is about 574.3311380720.

The spelling of 189446719 in words is "one hundred eighty-nine million, four hundred forty-six thousand, seven hundred nineteen".