997927 has 8 divisors (see below), whose sum is σ = 1171616. Its totient is φ = 832032.

The previous prime is 997897. The next prime is 997933. The reversal of 997927 is 729799.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-997927 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997327) 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, 1668 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (146452).

2⁹⁹⁷⁹²⁷ is an apocalyptic number.

997927 is a deficient number, since it is larger than the sum of its proper divisors (173689).

997927 is a wasteful number, since it uses less digits than its factorization.

997927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897.

The product of its digits is 71442, while the sum is 43.

The square root of 997927 is about 998.9629622764. The cubic root of 997927 is about 99.9308521968.

It can be divided in two parts, 99792 and 7, that added together give a palindrome (99799).

The spelling of 997927 in words is "nine hundred ninety-seven thousand, nine hundred twenty-seven".