1189143859 has 2 divisors, whose sum is σ = 1189143860. Its totient is φ = 1189143858.

The previous prime is 1189143853. The next prime is 1189143871. The reversal of 1189143859 is 9583419811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1189143859 - 2⁵ = 1189143827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1189143853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594571929 + 594571930.

It is an arithmetic number, because the mean of its divisors is an integer number (594571930).

Almost surely, 2^1189143859 is an apocalyptic number.

1189143859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189143859 is an equidigital number, since it uses as much as digits as its factorization.

1189143859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 49.

The square root of 1189143859 is about 34483.9652447337. The cubic root of 1189143859 is about 1059.4443091290. Note that the first 3 decimals are identical.

The spelling of 1189143859 in words is "one billion, one hundred eighty-nine million, one hundred forty-three thousand, eight hundred fifty-nine".