997247 has 2 divisors, whose sum is σ = 997248. Its totient is φ = 997246.

The previous prime is 997219. The next prime is 997259. The reversal of 997247 is 742799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498623 + 498624.

It is an arithmetic number, because the mean of its divisors is an integer number (498624).

2⁹⁹⁷²⁴⁷ is an apocalyptic number.

997247 is a deficient number, since it is larger than the sum of its proper divisors (1).

997247 is an equidigital number, since it uses as much as digits as its factorization.

997247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 997247 is about 998.6225513176. The cubic root of 997247 is about 99.9081489931.

The spelling of 997247 in words is "nine hundred ninety-seven thousand, two hundred forty-seven".