2001320747 has 2 divisors, whose sum is σ = 2001320748. Its totient is φ = 2001320746.

The previous prime is 2001320743. The next prime is 2001320773. The reversal of 2001320747 is 7470231002.

It is an a-pointer prime, because the next prime (2001320773) can be obtained adding 2001320747 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001320747 - 2² = 2001320743 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001320743) 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, 1000660373 + 1000660374.

It is an arithmetic number, because the mean of its divisors is an integer number (1000660374).

Almost surely, 2^2001320747 is an apocalyptic number.

2001320747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001320747 is an equidigital number, since it uses as much as digits as its factorization.

2001320747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 2001320747 is about 44736.1235133309. The cubic root of 2001320747 is about 1260.1983283592.

Adding to 2001320747 its reverse (7470231002), we get a palindrome (9471551749).

The spelling of 2001320747 in words is "two billion, one million, three hundred twenty thousand, seven hundred forty-seven".