9997173906 has 16 divisors (see below), whose sum is σ = 20000707104. Its totient is φ = 3331331424.

The previous prime is 9997173899. The next prime is 9997173929. The reversal of 9997173906 is 6093717999.

It is a super-2 number, since 2×9997173906² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9997173906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244411 + ... + 282366.

It is an arithmetic number, because the mean of its divisors is an integer number (1250044194).

Almost surely, 2^9997173906 is an apocalyptic number.

9997173906 is an abundant number, since it is smaller than the sum of its proper divisors (10003533198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9997173906 is a wasteful number, since it uses less digits than its factorization.

9997173906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529945.

The product of its (nonzero) digits is 5786802, while the sum is 60.

The square root of 9997173906 is about 99985.8685315080. The cubic root of 9997173906 is about 2154.2317164116.

The spelling of 9997173906 in words is "nine billion, nine hundred ninety-seven million, one hundred seventy-three thousand, nine hundred six".