1031311009 has 2 divisors, whose sum is σ = 1031311010. Its totient is φ = 1031311008.

The previous prime is 1031310949. The next prime is 1031311037. The reversal of 1031311009 is 9001131301.

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., 669360384 + 361950625 = 25872^2 + 19025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031311009 - 2¹³ = 1031302817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031311049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515655504 + 515655505.

It is an arithmetic number, because the mean of its divisors is an integer number (515655505).

Almost surely, 2^1031311009 is an apocalyptic number.

It is an amenable number.

1031311009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031311009 is an equidigital number, since it uses as much as digits as its factorization.

1031311009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 1031311009 is about 32114.0313414557. The cubic root of 1031311009 is about 1010.3299281576.

The spelling of 1031311009 in words is "one billion, thirty-one million, three hundred eleven thousand, nine".