1012323209 has 2 divisors, whose sum is σ = 1012323210. Its totient is φ = 1012323208.

The previous prime is 1012323203. The next prime is 1012323229. The reversal of 1012323209 is 9023232101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965469184 + 46854025 = 31072^2 + 6845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012323209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1012323203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506161604 + 506161605.

It is an arithmetic number, because the mean of its divisors is an integer number (506161605).

Almost surely, 2^1012323209 is an apocalyptic number.

It is an amenable number.

1012323209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012323209 is an equidigital number, since it uses as much as digits as its factorization.

1012323209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1012323209 is about 31817.0270295639. The cubic root of 1012323209 is about 1004.0909774148.

The spelling of 1012323209 in words is "one billion, twelve million, three hundred twenty-three thousand, two hundred nine".