997357 has 2 divisors, whose sum is σ = 997358. Its totient is φ = 997356.

The previous prime is 997343. The next prime is 997369. The reversal of 997357 is 753799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741321 + 256036 = 861^2 + 506^2 .

It is an emirp because it is prime and its reverse (753799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 997357 - 2¹⁵ = 964589 is a prime.

997357 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (997307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498678 + 498679.

It is an arithmetic number, because the mean of its divisors is an integer number (498679).

2⁹⁹⁷³⁵⁷ is an apocalyptic number.

It is an amenable number.

997357 is a deficient number, since it is larger than the sum of its proper divisors (1).

997357 is an equidigital number, since it uses as much as digits as its factorization.

997357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59535, while the sum is 40.

The square root of 997357 is about 998.6776256631. The cubic root of 997357 is about 99.9118222697.

The spelling of 997357 in words is "nine hundred ninety-seven thousand, three hundred fifty-seven".