997546369 has 2 divisors, whose sum is σ = 997546370. Its totient is φ = 997546368.

The previous prime is 997546343. The next prime is 997546399. The reversal of 997546369 is 963645799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787644225 + 209902144 = 28065^2 + 14488^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997546369 is a prime.

It is a super-2 number, since 2×997546369² = 1990197516610168322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (997546399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498773184 + 498773185.

It is an arithmetic number, because the mean of its divisors is an integer number (498773185).

Almost surely, 2^997546369 is an apocalyptic number.

It is an amenable number.

997546369 is a deficient number, since it is larger than the sum of its proper divisors (1).

997546369 is an equidigital number, since it uses as much as digits as its factorization.

997546369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11022480, while the sum is 58.

The square root of 997546369 is about 31583.9574626107. The cubic root of 997546369 is about 999.1814531639.

The spelling of 997546369 in words is "nine hundred ninety-seven million, five hundred forty-six thousand, three hundred sixty-nine".