1213579233 has 8 divisors (see below), whose sum is σ = 1797895200. Its totient is φ = 809052804.

The previous prime is 1213579219. The next prime is 1213579247. The reversal of 1213579233 is 3329753121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1213579219) and next prime (1213579247).

It is not a de Polignac number, because 1213579233 - 2¹² = 1213575137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213579253) 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, 22473663 + ... + 22473716.

It is an arithmetic number, because the mean of its divisors is an integer number (224736900).

Almost surely, 2^1213579233 is an apocalyptic number.

It is an amenable number.

1213579233 is a deficient number, since it is larger than the sum of its proper divisors (584315967).

1213579233 is an equidigital number, since it uses as much as digits as its factorization.

1213579233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44947388 (or 44947382 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 1213579233 is about 34836.4641288406. The cubic root of 1213579233 is about 1066.6519018247.

The spelling of 1213579233 in words is "one billion, two hundred thirteen million, five hundred seventy-nine thousand, two hundred thirty-three".