997601 has 8 divisors (see below), whose sum is σ = 1101600. Its totient is φ = 895840.

The previous prime is 997597. The next prime is 997609. The reversal of 997601 is 106799.

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

It is not a de Polignac number, because 997601 - 2² = 997597 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 (997609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (137700).

2⁹⁹⁷⁶⁰¹ is an apocalyptic number.

It is an amenable number.

997601 is a deficient number, since it is larger than the sum of its proper divisors (103999).

997601 is a wasteful number, since it uses less digits than its factorization.

997601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 997601 is about 998.7997797357. The cubic root of 997601 is about 99.9199693013.

The spelling of 997601 in words is "nine hundred ninety-seven thousand, six hundred one".