997691005 has 16 divisors (see below), whose sum is σ = 1215212544. Its totient is φ = 786248640.

The previous prime is 997690997. The next prime is 997691041. The reversal of 997691005 is 500196799.

It is not a de Polignac number, because 997691005 - 2³ = 997690997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91684 + ... + 101986.

It is an arithmetic number, because the mean of its divisors is an integer number (75950784).

Almost surely, 2^997691005 is an apocalyptic number.

It is an amenable number.

997691005 is a deficient number, since it is larger than the sum of its proper divisors (217521539).

997691005 is a wasteful number, since it uses less digits than its factorization.

997691005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596.

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 997691005 is about 31586.2470863507. The cubic root of 997691005 is about 999.2297418547.

The spelling of 997691005 in words is "nine hundred ninety-seven million, six hundred ninety-one thousand, five".