31320209760997 has 2 divisors, whose sum is σ = 31320209760998. Its totient is φ = 31320209760996.

The previous prime is 31320209760989. The next prime is 31320209761021. The reversal of 31320209760997 is 79906790202313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28500500479396 + 2819709281601 = 5338586^2 + 1679199^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320209760997 - 2³ = 31320209760989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320209760947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660104880498 + 15660104880499.

It is an arithmetic number, because the mean of its divisors is an integer number (15660104880499).

Almost surely, 2^{31320209760997} is an apocalyptic number.

It is an amenable number.

31320209760997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320209760997 is an equidigital number, since it uses as much as digits as its factorization.

31320209760997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7715736, while the sum is 58.

The spelling of 31320209760997 in words is "thirty-one trillion, three hundred twenty billion, two hundred nine million, seven hundred sixty thousand, nine hundred ninety-seven".