997930 has 8 divisors (see below), whose sum is σ = 1796292. Its totient is φ = 399168.

The previous prime is 997897. The next prime is 997933. The reversal of 997930 is 39799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 11881 = 993^2 + 109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 997930.

It is not an unprimeable number, because it can be changed into a prime (997933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49887 + ... + 49906.

2⁹⁹⁷⁹³⁰ is an apocalyptic number.

997930 is a deficient number, since it is larger than the sum of its proper divisors (798362).

997930 is a wasteful number, since it uses less digits than its factorization.

997930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99800.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 997930 is about 998.9644638324. The cubic root of 997930 is about 99.9309523352.

The spelling of 997930 in words is "nine hundred ninety-seven thousand, nine hundred thirty".