1213804189 has 8 divisors (see below), whose sum is σ = 1375972640. Its totient is φ = 1061464176.

The previous prime is 1213804183. The next prime is 1213804217. The reversal of 1213804189 is 9814083121.

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 1213804189 - 2¹¹ = 1213802141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213804183) 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, 2456847 + ... + 2457340.

It is an arithmetic number, because the mean of its divisors is an integer number (171996580).

Almost surely, 2^1213804189 is an apocalyptic number.

1213804189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1213804189 is a deficient number, since it is larger than the sum of its proper divisors (162168451).

1213804189 is a wasteful number, since it uses less digits than its factorization.

1213804189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4914219.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1213804189 is about 34839.6927225256. The cubic root of 1213804189 is about 1066.7178046555.

The spelling of 1213804189 in words is "one billion, two hundred thirteen million, eight hundred four thousand, one hundred eighty-nine".