313244643997 has 2 divisors, whose sum is σ = 313244643998. Its totient is φ = 313244643996.

The previous prime is 313244643989. The next prime is 313244644049. The reversal of 313244643997 is 799346442313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290144899801 + 23099744196 = 538651^2 + 151986^2 .

It is a cyclic number.

It is not a de Polignac number, because 313244643997 - 2³ = 313244643989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313244643937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156622321998 + 156622321999.

It is an arithmetic number, because the mean of its divisors is an integer number (156622321999).

Almost surely, 2^313244643997 is an apocalyptic number.

It is an amenable number.

313244643997 is a deficient number, since it is larger than the sum of its proper divisors (1).

313244643997 is an equidigital number, since it uses as much as digits as its factorization.

313244643997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 55.

The spelling of 313244643997 in words is "three hundred thirteen billion, two hundred forty-four million, six hundred forty-three thousand, nine hundred ninety-seven".