189982919 has 16 divisors (see below), whose sum is σ = 230830080. Its totient is φ = 152733600.

The previous prime is 189982907. The next prime is 189982963. The reversal of 189982919 is 919289981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189982919 is a prime.

It is a super-2 number, since 2×189982919² = 72187019023521122, 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 (189982519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6362 + ... + 20504.

It is an arithmetic number, because the mean of its divisors is an integer number (14426880).

Almost surely, 2^189982919 is an apocalyptic number.

189982919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

189982919 is a deficient number, since it is larger than the sum of its proper divisors (40847161).

189982919 is a wasteful number, since it uses less digits than its factorization.

189982919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14270.

The product of its digits is 839808, while the sum is 56.

The square root of 189982919 is about 13783.4291451728. The cubic root of 189982919 is about 574.8724798500.

The spelling of 189982919 in words is "one hundred eighty-nine million, nine hundred eighty-two thousand, nine hundred nineteen".