1213202783 has 8 divisors (see below), whose sum is σ = 1322268528. Its totient is φ = 1106385984.

The previous prime is 1213202759. The next prime is 1213202803. The reversal of 1213202783 is 3872023121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213202783 - 2⁶ = 1213202719 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 (1213202723) 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, 561110 + ... + 563267.

It is an arithmetic number, because the mean of its divisors is an integer number (165283566).

Almost surely, 2^1213202783 is an apocalyptic number.

1213202783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213202783 is a deficient number, since it is larger than the sum of its proper divisors (109065745).

1213202783 is a wasteful number, since it uses less digits than its factorization.

1213202783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124473.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1213202783 is about 34831.0606068779. The cubic root of 1213202783 is about 1066.5415992795.

The spelling of 1213202783 in words is "one billion, two hundred thirteen million, two hundred two thousand, seven hundred eighty-three".