997279 has 2 divisors, whose sum is σ = 997280. Its totient is φ = 997278.

The previous prime is 997273. The next prime is 997307. The reversal of 997279 is 972799.

It is a weak prime.

It is an emirp because it is prime and its reverse (972799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997279 - 2⁵ = 997247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498639 + 498640.

It is an arithmetic number, because the mean of its divisors is an integer number (498640).

2⁹⁹⁷²⁷⁹ is an apocalyptic number.

997279 is a deficient number, since it is larger than the sum of its proper divisors (1).

997279 is an equidigital number, since it uses as much as digits as its factorization.

997279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 997279 is about 998.6385732586. The cubic root of 997279 is about 99.9092176105.

The spelling of 997279 in words is "nine hundred ninety-seven thousand, two hundred seventy-nine".