31320434009 has 2 divisors, whose sum is σ = 31320434010. Its totient is φ = 31320434008.

The previous prime is 31320433981. The next prime is 31320434053. The reversal of 31320434009 is 90043402313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24184915225 + 7135518784 = 155515^2 + 84472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320434009 is a prime.

It is not a weakly prime, because it can be changed into another prime (31320439009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660217004 + 15660217005.

It is an arithmetic number, because the mean of its divisors is an integer number (15660217005).

Almost surely, 2^31320434009 is an apocalyptic number.

It is an amenable number.

31320434009 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320434009 is an equidigital number, since it uses as much as digits as its factorization.

31320434009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 31320434009 in words is "thirty-one billion, three hundred twenty million, four hundred thirty-four thousand, nine".