1231198844 has 6 divisors (see below), whose sum is σ = 2154597984. Its totient is φ = 615599420.

The previous prime is 1231198819. The next prime is 1231198847. The reversal of 1231198844 is 4488911321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231198847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153899852 + ... + 153899859.

It is an arithmetic number, because the mean of its divisors is an integer number (359099664).

Almost surely, 2^1231198844 is an apocalyptic number.

It is an amenable number.

1231198844 is a deficient number, since it is larger than the sum of its proper divisors (923399140).

1231198844 is a wasteful number, since it uses less digits than its factorization.

1231198844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307799715 (or 307799713 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 1231198844 is about 35088.4431686560. The cubic root of 1231198844 is about 1071.7892571827.

The spelling of 1231198844 in words is "one billion, two hundred thirty-one million, one hundred ninety-eight thousand, eight hundred forty-four".