2001231983 has 2 divisors, whose sum is σ = 2001231984. Its totient is φ = 2001231982.

The previous prime is 2001231979. The next prime is 2001231989. The reversal of 2001231983 is 3891321002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001231983 - 2² = 2001231979 is a prime.

It is a super-2 number, since 2×2001231983² = 8009858899564224578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001231989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000615991 + 1000615992.

It is an arithmetic number, because the mean of its divisors is an integer number (1000615992).

Almost surely, 2^2001231983 is an apocalyptic number.

2001231983 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001231983 is an equidigital number, since it uses as much as digits as its factorization.

2001231983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2001231983 is about 44735.1314181595. The cubic root of 2001231983 is about 1260.1796970131.

Adding to 2001231983 its reverse (3891321002), we get a palindrome (5892552985).

The spelling of 2001231983 in words is "two billion, one million, two hundred thirty-one thousand, nine hundred eighty-three".