1213403013 has 6 divisors (see below), whose sum is σ = 1752693254. Its totient is φ = 808935336.

The previous prime is 1213403003. The next prime is 1213403017. The reversal of 1213403013 is 3103043121.

1213403013 is a `hidden beast` number, since 1 + 21 + 340 + 301 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1067524929 + 145878084 = 32673^2 + 12078^2 .

It is not a de Polignac number, because 1213403013 - 2⁴ = 1213402997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213403017) 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 5 ways as a sum of consecutive naturals, for example, 67411270 + ... + 67411287.

Almost surely, 2^1213403013 is an apocalyptic number.

It is an amenable number.

1213403013 is a deficient number, since it is larger than the sum of its proper divisors (539290241).

1213403013 is a wasteful number, since it uses less digits than its factorization.

1213403013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134822563 (or 134822560 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213403013 is about 34833.9347906607. The cubic root of 1213403013 is about 1066.6002709432.

Adding to 1213403013 its reverse (3103043121), we get a palindrome (4316446134).

The spelling of 1213403013 in words is "one billion, two hundred thirteen million, four hundred three thousand, thirteen".