997829 has 4 divisors (see below), whose sum is σ = 1140384. Its totient is φ = 855276.

The previous prime is 997813. The next prime is 997877. The reversal of 997829 is 928799.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 997829 - 2⁴ = 997813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 997829.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71267 + ... + 71280.

It is an arithmetic number, because the mean of its divisors is an integer number (285096).

2⁹⁹⁷⁸²⁹ is an apocalyptic number.

It is an amenable number.

997829 is a deficient number, since it is larger than the sum of its proper divisors (142555).

997829 is a wasteful number, since it uses less digits than its factorization.

997829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142554.

The product of its digits is 81648, while the sum is 44.

The square root of 997829 is about 998.9139102045. The cubic root of 997829 is about 99.9275809007.

The spelling of 997829 in words is "nine hundred ninety-seven thousand, eight hundred twenty-nine".