9997442 has 32 divisors (see below), whose sum is σ = 18625152. Its totient is φ = 3919104.

The previous prime is 9997441. The next prime is 9997451. The reversal of 9997442 is 2447999.

It is a d-powerful number, because it can be written as 9 + 9 + 9⁷ + 7⁷ + 4⁸ + 4¹¹ + 2¹⁷ .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9997393 and 9997402.

It is not an unprimeable number, because it can be changed into a prime (9997441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29498 + ... + 29834.

It is an arithmetic number, because the mean of its divisors is an integer number (582036).

Almost surely, 2^9997442 is an apocalyptic number.

9997442 is a deficient number, since it is larger than the sum of its proper divisors (8627710).

9997442 is a wasteful number, since it uses less digits than its factorization.

9997442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522.

The product of its digits is 163296, while the sum is 44.

The square root of 9997442 is about 3161.8731789874. The cubic root of 9997442 is about 215.4250972901.

The spelling of 9997442 in words is "nine million, nine hundred ninety-seven thousand, four hundred forty-two".