997849 has 8 divisors (see below), whose sum is σ = 1071360. Its totient is φ = 926016.

The previous prime is 997813. The next prime is 997877. The reversal of 997849 is 948799.

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

It is a cyclic number.

It is not a de Polignac number, because 997849 - 2¹¹ = 995801 is a prime.

It is a Duffinian number.

997849 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 997799 and 997808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 972 + ... + 1714.

It is an arithmetic number, because the mean of its divisors is an integer number (133920).

2⁹⁹⁷⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

997849 is a deficient number, since it is larger than the sum of its proper divisors (73511).

997849 is a wasteful number, since it uses less digits than its factorization.

997849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839.

The product of its digits is 163296, while the sum is 46.

The square root of 997849 is about 998.9239210270. The cubic root of 997849 is about 99.9282485296.

The spelling of 997849 in words is "nine hundred ninety-seven thousand, eight hundred forty-nine".