1001311973 has 2 divisors, whose sum is σ = 1001311974. Its totient is φ = 1001311972.

The previous prime is 1001311943. The next prime is 1001312009. The reversal of 1001311973 is 3791131001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968329924 + 32982049 = 31118^2 + 5743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001311973 - 2¹⁰ = 1001310949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001311903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500655986 + 500655987.

It is an arithmetic number, because the mean of its divisors is an integer number (500655987).

Almost surely, 2^1001311973 is an apocalyptic number.

It is an amenable number.

1001311973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001311973 is an equidigital number, since it uses as much as digits as its factorization.

1001311973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 1001311973 is about 31643.5139167571. The cubic root of 1001311973 is about 1000.4371332200.

Adding to 1001311973 its reverse (3791131001), we get a palindrome (4792442974).

The spelling of 1001311973 in words is "one billion, one million, three hundred eleven thousand, nine hundred seventy-three".