997862 has 4 divisors (see below), whose sum is σ = 1496796. Its totient is φ = 498930.

The previous prime is 997813. The next prime is 997877. The reversal of 997862 is 268799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 268799 = 389 ⋅691.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997862.

It is an unprimeable number.

997862 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 249464 + ... + 249467.

It is an arithmetic number, because the mean of its divisors is an integer number (374199).

2⁹⁹⁷⁸⁶² is an apocalyptic number.

997862 is a deficient number, since it is larger than the sum of its proper divisors (498934).

997862 is a wasteful number, since it uses less digits than its factorization.

997862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498933.

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

The square root of 997862 is about 998.9304280079. The cubic root of 997862 is about 99.9286824835.

The spelling of 997862 in words is "nine hundred ninety-seven thousand, eight hundred sixty-two".