997933 has 2 divisors, whose sum is σ = 997934.
Its totient is φ = 997932.
The previous prime is 997897. The next prime is 997949. The reversal of 997933 is 339799.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 896809 + 101124 = 947^2 + 318^2
It is an emirp because it is prime and its reverse (339799) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-997933 is a 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 (997963) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498966 + 498967.
It is an arithmetic number, because the mean of its divisors is an integer number (498967).
2997933 is an apocalyptic number.
It is an amenable number.
997933 is a deficient number, since it is larger than the sum of its proper divisors (1).
997933 is an equidigital number, since it uses as much as digits as its factorization.
997933 is an evil number, because the sum of its binary digits is even.
The product of its digits is 45927, while the sum is 40.
The square root of 997933 is about 998.9659653862.
The cubic root of 997933 is about 99.9310524733.
The spelling of 997933 in words is "nine hundred ninety-seven thousand, nine hundred thirty-three".