997319 has 2 divisors, whose sum is σ = 997320. Its totient is φ = 997318.

The previous prime is 997309. The next prime is 997327. The reversal of 997319 is 913799.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (913799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997319 - 2¹⁶ = 931783 is a prime.

It is a super-2 number, since 2×997319² = 1989290375522, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498659 + 498660.

It is an arithmetic number, because the mean of its divisors is an integer number (498660).

2⁹⁹⁷³¹⁹ is an apocalyptic number.

997319 is a deficient number, since it is larger than the sum of its proper divisors (1).

997319 is an equidigital number, since it uses as much as digits as its factorization.

997319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15309, while the sum is 38.

The square root of 997319 is about 998.6586003235. The cubic root of 997319 is about 99.9105533502.

The spelling of 997319 in words is "nine hundred ninety-seven thousand, three hundred nineteen".