2001323957 has 2 divisors, whose sum is σ = 2001323958. Its totient is φ = 2001323956.

The previous prime is 2001323927. The next prime is 2001323977. The reversal of 2001323957 is 7593231002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1984791601 + 16532356 = 44551^2 + 4066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001323957 - 2⁶ = 2001323893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001323917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000661978 + 1000661979.

It is an arithmetic number, because the mean of its divisors is an integer number (1000661979).

Almost surely, 2^2001323957 is an apocalyptic number.

It is an amenable number.

2001323957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001323957 is an equidigital number, since it uses as much as digits as its factorization.

2001323957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 2001323957 is about 44736.1593903634. The cubic root of 2001323957 is about 1260.1990021200.

Adding to 2001323957 its reverse (7593231002), we get a palindrome (9594554959).

The spelling of 2001323957 in words is "two billion, one million, three hundred twenty-three thousand, nine hundred fifty-seven".