997995 has 8 divisors (see below), whose sum is σ = 1596816. Its totient is φ = 532256.

The previous prime is 997991. The next prime is 998009. The reversal of 997995 is 599799.

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 997995 - 2² = 997991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (997991) 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, 33252 + ... + 33281.

It is an arithmetic number, because the mean of its divisors is an integer number (199602).

2⁹⁹⁷⁹⁹⁵ is an apocalyptic number.

997995 is a deficient number, since it is larger than the sum of its proper divisors (598821).

997995 is a wasteful number, since it uses less digits than its factorization.

997995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66541.

The product of its digits is 229635, while the sum is 48.

The square root of 997995 is about 998.9969969925. The cubic root of 997995 is about 99.9331219499.

The spelling of 997995 in words is "nine hundred ninety-seven thousand, nine hundred ninety-five".