1213891196 has 12 divisors (see below), whose sum is σ = 2427782448. Its totient is φ = 520239072.

The previous prime is 1213891183. The next prime is 1213891199. The reversal of 1213891196 is 6911983121.

1213891196 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213891199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21676601 + ... + 21676656.

It is an arithmetic number, because the mean of its divisors is an integer number (202315204).

Almost surely, 2^1213891196 is an apocalyptic number.

It is an amenable number.

1213891196 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213891196 is a wasteful number, since it uses less digits than its factorization.

1213891196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43353268 (or 43353266 counting only the distinct ones).

The product of its digits is 23328, while the sum is 41.

The square root of 1213891196 is about 34840.9413764898. The cubic root of 1213891196 is about 1066.7432919346.

The spelling of 1213891196 in words is "one billion, two hundred thirteen million, eight hundred ninety-one thousand, one hundred ninety-six".