997671 has 16 divisors (see below), whose sum is σ = 1463040. Its totient is φ = 601920.

The previous prime is 997663. The next prime is 997681. The reversal of 997671 is 176799.

It is not a de Polignac number, because 997671 - 2³ = 997663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (91440).

2⁹⁹⁷⁶⁷¹ is an apocalyptic number.

997671 is a deficient number, since it is larger than the sum of its proper divisors (465369).

997671 is a wasteful number, since it uses less digits than its factorization.

997671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806.

The product of its digits is 23814, while the sum is 39.

The square root of 997671 is about 998.8348211792. The cubic root of 997671 is about 99.9223063192.

The spelling of 997671 in words is "nine hundred ninety-seven thousand, six hundred seventy-one".