1213001983 has 4 divisors (see below), whose sum is σ = 1213098120. Its totient is φ = 1212905848.

The previous prime is 1213001963. The next prime is 1213001989. The reversal of 1213001983 is 3891003121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3891003121 = 379 ⋅10266499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213001983 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 (1213001989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25660 + ... + 55537.

It is an arithmetic number, because the mean of its divisors is an integer number (303274530).

Almost surely, 2^1213001983 is an apocalyptic number.

1213001983 is a deficient number, since it is larger than the sum of its proper divisors (96137).

1213001983 is an equidigital number, since it uses as much as digits as its factorization.

1213001983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96136.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1213001983 is about 34828.1780028758. The cubic root of 1213001983 is about 1066.4827541101.

The spelling of 1213001983 in words is "one billion, two hundred thirteen million, one thousand, nine hundred eighty-three".