997186313 has 2 divisors, whose sum is σ = 997186314. Its totient is φ = 997186312.

The previous prime is 997186301. The next prime is 997186327. The reversal of 997186313 is 313681799.

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., 510895609 + 486290704 = 22603^2 + 22052^2 .

It is a cyclic number.

It is not a de Polignac number, because 997186313 - 2¹⁰ = 997185289 is a prime.

It is not a weakly prime, because it can be changed into another prime (997186213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498593156 + 498593157.

It is an arithmetic number, because the mean of its divisors is an integer number (498593157).

Almost surely, 2^997186313 is an apocalyptic number.

It is an amenable number.

997186313 is a deficient number, since it is larger than the sum of its proper divisors (1).

997186313 is an equidigital number, since it uses as much as digits as its factorization.

997186313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 997186313 is about 31578.2569658301. The cubic root of 997186313 is about 999.0612233074.

The spelling of 997186313 in words is "nine hundred ninety-seven million, one hundred eighty-six thousand, three hundred thirteen".