1229891443 has 16 divisors (see below), whose sum is σ = 1413925632. Its totient is φ = 1058860000.

The previous prime is 1229891437. The next prime is 1229891483. The reversal of 1229891443 is 3441989221.

It is not a de Polignac number, because 1229891443 - 2¹³ = 1229883251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1229891443.

It is not an unprimeable number, because it can be changed into a prime (1229891423) 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, 1488 + ... + 49618.

It is an arithmetic number, because the mean of its divisors is an integer number (88370352).

Almost surely, 2^1229891443 is an apocalyptic number.

1229891443 is a deficient number, since it is larger than the sum of its proper divisors (184034189).

1229891443 is a wasteful number, since it uses less digits than its factorization.

1229891443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48266.

The product of its digits is 124416, while the sum is 43.

The square root of 1229891443 is about 35069.8081403363. The cubic root of 1229891443 is about 1071.4097477743.

The spelling of 1229891443 in words is "one billion, two hundred twenty-nine million, eight hundred ninety-one thousand, four hundred forty-three".