1213723203 has 64 divisors (see below), whose sum is σ = 2094833664. Its totient is φ = 606816000.

The previous prime is 1213723187. The next prime is 1213723207. The reversal of 1213723203 is 3023273121.

It is not a de Polignac number, because 1213723203 - 2⁴ = 1213723187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213723207) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 704383 + ... + 706103.

It is an arithmetic number, because the mean of its divisors is an integer number (32731776).

Almost surely, 2^1213723203 is an apocalyptic number.

1213723203 is a deficient number, since it is larger than the sum of its proper divisors (881110461).

1213723203 is a wasteful number, since it uses less digits than its factorization.

1213723203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 1213723203 is about 34838.5304368597. The cubic root of 1213723203 is about 1066.6940800355.

Adding to 1213723203 its reverse (3023273121), we get a palindrome (4236996324).

The spelling of 1213723203 in words is "one billion, two hundred thirteen million, seven hundred twenty-three thousand, two hundred three".