997755329 has 2 divisors, whose sum is σ = 997755330. Its totient is φ = 997755328.

The previous prime is 997755299. The next prime is 997755331. The reversal of 997755329 is 923557799.

It is a happy number.

997755329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 807866929 + 189888400 = 28423^2 + 13780^2 .

It is an emirp because it is prime and its reverse (923557799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997755329 is a prime.

Together with 997755331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (997755349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498877664 + 498877665.

It is an arithmetic number, because the mean of its divisors is an integer number (498877665).

Almost surely, 2^997755329 is an apocalyptic number.

It is an amenable number.

997755329 is a deficient number, since it is larger than the sum of its proper divisors (1).

997755329 is an equidigital number, since it uses as much as digits as its factorization.

997755329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5358150, while the sum is 56.

The square root of 997755329 is about 31587.2652979013. The cubic root of 997755329 is about 999.2512157955.

The spelling of 997755329 in words is "nine hundred ninety-seven million, seven hundred fifty-five thousand, three hundred twenty-nine".