997826 has 8 divisors (see below), whose sum is σ = 1515024. Its totient is φ = 492820.

The previous prime is 997813. The next prime is 997877. The reversal of 997826 is 628799.

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

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 3 ways as a sum of consecutive naturals, for example, 2840 + ... + 3171.

It is an arithmetic number, because the mean of its divisors is an integer number (189378).

2⁹⁹⁷⁸²⁶ is an apocalyptic number.

997826 is a deficient number, since it is larger than the sum of its proper divisors (517198).

997826 is a wasteful number, since it uses less digits than its factorization.

997826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096.

The product of its digits is 54432, while the sum is 41.

The square root of 997826 is about 998.9124085724. The cubic root of 997826 is about 99.9274807556.

The spelling of 997826 in words is "nine hundred ninety-seven thousand, eight hundred twenty-six".