997867 has 8 divisors (see below), whose sum is σ = 1093680. Its totient is φ = 904800.

The previous prime is 997813. The next prime is 997877. The reversal of 997867 is 768799.

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

It is not a de Polignac number, because 997867 - 2⁷ = 997739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117 + ... + 1417.

It is an arithmetic number, because the mean of its divisors is an integer number (136710).

2⁹⁹⁷⁸⁶⁷ is an apocalyptic number.

997867 is a deficient number, since it is larger than the sum of its proper divisors (95813).

997867 is a wasteful number, since it uses less digits than its factorization.

997867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373.

The product of its digits is 190512, while the sum is 46.

The square root of 997867 is about 998.9329306815. The cubic root of 997867 is about 99.9288493879.

The spelling of 997867 in words is "nine hundred ninety-seven thousand, eight hundred sixty-seven".