997299353 has 2 divisors, whose sum is σ = 997299354. Its totient is φ = 997299352.

The previous prime is 997299319. The next prime is 997299371. The reversal of 997299353 is 353992799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755590144 + 241709209 = 27488^2 + 15547^2 .

It is a cyclic number.

It is not a de Polignac number, because 997299353 - 2¹⁰ = 997298329 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (997299313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498649676 + 498649677.

It is an arithmetic number, because the mean of its divisors is an integer number (498649677).

Almost surely, 2^997299353 is an apocalyptic number.

It is an amenable number.

997299353 is a deficient number, since it is larger than the sum of its proper divisors (1).

997299353 is an equidigital number, since it uses as much as digits as its factorization.

997299353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4133430, while the sum is 56.

The square root of 997299353 is about 31580.0467542402. The cubic root of 997299353 is about 999.0989727270.

The spelling of 997299353 in words is "nine hundred ninety-seven million, two hundred ninety-nine thousand, three hundred fifty-three".