997910 has 16 divisors (see below), whose sum is σ = 1822176. Its totient is φ = 393408.

The previous prime is 997897. The next prime is 997933. The reversal of 997910 is 19799.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (113886).

2⁹⁹⁷⁹¹⁰ is an apocalyptic number.

997910 is a deficient number, since it is larger than the sum of its proper divisors (824266).

997910 is a wasteful number, since it uses less digits than its factorization.

997910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 997910 is about 998.9544534162. The cubic root of 997910 is about 99.9302847425.

The spelling of 997910 in words is "nine hundred ninety-seven thousand, nine hundred ten".