9997722 has 32 divisors (see below), whose sum is σ = 25392000. Its totient is φ = 2856384.

The previous prime is 9997711. The next prime is 9997739. The reversal of 9997722 is 2277999.

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12847 + ... + 13602.

It is an arithmetic number, because the mean of its divisors is an integer number (793500).

Almost surely, 2^9997722 is an apocalyptic number.

9997722 is an abundant number, since it is smaller than the sum of its proper divisors (15394278).

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

9997722 is a wasteful number, since it uses less digits than its factorization.

9997722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26467 (or 26461 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 9997722 is about 3161.9174562281. The cubic root of 9997722 is about 215.4271084201.

It can be divided in two parts, 99977 and 22, that added together give a palindrome (99999).

The spelling of 9997722 in words is "nine million, nine hundred ninety-seven thousand, seven hundred twenty-two".