997691003 has 8 divisors (see below), whose sum is σ = 1015124400. Its totient is φ = 980275168.

The previous prime is 997690997. The next prime is 997691041. The reversal of 997691003 is 300196799.

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 a de Polignac number, because none of the positive numbers 2^k-997691003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997690003) 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, 168725 + ... + 174537.

It is an arithmetic number, because the mean of its divisors is an integer number (126890550).

Almost surely, 2^997691003 is an apocalyptic number.

997691003 is a deficient number, since it is larger than the sum of its proper divisors (17433397).

997691003 is a wasteful number, since it uses less digits than its factorization.

997691003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8781.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 997691003 is about 31586.2470546914. The cubic root of 997691003 is about 999.2297411870.

The spelling of 997691003 in words is "nine hundred ninety-seven million, six hundred ninety-one thousand, three".