997353593 has 2 divisors, whose sum is σ = 997353594. Its totient is φ = 997353592.

The previous prime is 997353571. The next prime is 997353727. The reversal of 997353593 is 395353799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 848440384 + 148913209 = 29128^2 + 12203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997353593 is a prime.

It is not a weakly prime, because it can be changed into another prime (997353563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498676796 + 498676797.

It is an arithmetic number, because the mean of its divisors is an integer number (498676797).

Almost surely, 2^997353593 is an apocalyptic number.

It is an amenable number.

997353593 is a deficient number, since it is larger than the sum of its proper divisors (1).

997353593 is an equidigital number, since it uses as much as digits as its factorization.

997353593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3444525, while the sum is 53.

The square root of 997353593 is about 31580.9055126670. The cubic root of 997353593 is about 999.1170850239.

The spelling of 997353593 in words is "nine hundred ninety-seven million, three hundred fifty-three thousand, five hundred ninety-three".