1001331073 has 2 divisors, whose sum is σ = 1001331074. Its totient is φ = 1001331072.

The previous prime is 1001331029. The next prime is 1001331091. The reversal of 1001331073 is 3701331001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 646837489 + 354493584 = 25433^2 + 18828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001331073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001331073.

It is not a weakly prime, because it can be changed into another prime (1001334073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500665536 + 500665537.

It is an arithmetic number, because the mean of its divisors is an integer number (500665537).

Almost surely, 2^1001331073 is an apocalyptic number.

It is an amenable number.

1001331073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001331073 is an equidigital number, since it uses as much as digits as its factorization.

1001331073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 1001331073 is about 31643.8157149229. The cubic root of 1001331073 is about 1000.4434942837.

Adding to 1001331073 its reverse (3701331001), we get a palindrome (4702662074).

The spelling of 1001331073 in words is "one billion, one million, three hundred thirty-one thousand, seventy-three".