1213604233 has 4 divisors (see below), whose sum is σ = 1277478160. Its totient is φ = 1149730308.

The previous prime is 1213604221. The next prime is 1213604239. The reversal of 1213604233 is 3324063121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213604233 - 2²¹ = 1211507081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213604198 and 1213604207.

It is not an unprimeable number, because it can be changed into a prime (1213604239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31936935 + ... + 31936972.

It is an arithmetic number, because the mean of its divisors is an integer number (319369540).

Almost surely, 2^1213604233 is an apocalyptic number.

It is an amenable number.

1213604233 is a deficient number, since it is larger than the sum of its proper divisors (63873927).

1213604233 is an equidigital number, since it uses as much as digits as its factorization.

1213604233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63873926.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1213604233 is about 34836.8229464169. The cubic root of 1213604233 is about 1066.6592261959.

Adding to 1213604233 its reverse (3324063121), we get a palindrome (4537667354).

The spelling of 1213604233 in words is "one billion, two hundred thirteen million, six hundred four thousand, two hundred thirty-three".