1213203399 has 8 divisors (see below), whose sum is σ = 1624317552. Its totient is φ = 805445760.

The previous prime is 1213203389. The next prime is 1213203403. The reversal of 1213203399 is 9933023121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213203399 - 2¹¹ = 1213201351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213203389) 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 7 ways as a sum of consecutive naturals, for example, 838284 + ... + 839729.

It is an arithmetic number, because the mean of its divisors is an integer number (203039694).

Almost surely, 2^1213203399 is an apocalyptic number.

1213203399 is a deficient number, since it is larger than the sum of its proper divisors (411114153).

1213203399 is a wasteful number, since it uses less digits than its factorization.

1213203399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678257.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 1213203399 is about 34831.0694495590. The cubic root of 1213203399 is about 1066.5417797905.

The spelling of 1213203399 in words is "one billion, two hundred thirteen million, two hundred three thousand, three hundred ninety-nine".