997711 has 8 divisors (see below), whose sum is σ = 1172304. Its totient is φ = 837120.

The previous prime is 997699. The next prime is 997727. The reversal of 997711 is 117799.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 997711 - 2⁷ = 997583 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997741) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3346 + ... + 3631.

It is an arithmetic number, because the mean of its divisors is an integer number (146538).

2⁹⁹⁷⁷¹¹ is an apocalyptic number.

997711 is a deficient number, since it is larger than the sum of its proper divisors (174593).

997711 is a wasteful number, since it uses less digits than its factorization.

997711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001.

The product of its digits is 3969, while the sum is 34.

The square root of 997711 is about 998.8548443092. The cubic root of 997711 is about 99.9236417090.

The spelling of 997711 in words is "nine hundred ninety-seven thousand, seven hundred eleven".