1143856819 has 8 divisors (see below), whose sum is σ = 1311986528. Its totient is φ = 976907520.

The previous prime is 1143856807. The next prime is 1143856843. The reversal of 1143856819 is 9186583411.

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 1143856819 - 2⁵ = 1143856787 is a prime.

It is a super-2 number, since 2×1143856819² = 2616816844745597522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143856619) 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 7 ways as a sum of consecutive naturals, for example, 293022 + ... + 296899.

It is an arithmetic number, because the mean of its divisors is an integer number (163998316).

Almost surely, 2^1143856819 is an apocalyptic number.

1143856819 is a deficient number, since it is larger than the sum of its proper divisors (168129709).

1143856819 is an equidigital number, since it uses as much as digits as its factorization.

1143856819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590205.

The product of its digits is 207360, while the sum is 46.

The square root of 1143856819 is about 33820.9523668391. The cubic root of 1143856819 is about 1045.8206716935.

The spelling of 1143856819 in words is "one billion, one hundred forty-three million, eight hundred fifty-six thousand, eight hundred nineteen".