9899542 has 16 divisors (see below), whose sum is σ = 15781392. Its totient is φ = 4641280.

The previous prime is 9899531. The next prime is 9899567. The reversal of 9899542 is 2459989.

It is a junction number, because it is equal to n+sod(n) for n = 9899492 and 9899501.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 16398 + ... + 16990.

It is an arithmetic number, because the mean of its divisors is an integer number (986337).

Almost surely, 2^9899542 is an apocalyptic number.

9899542 is a deficient number, since it is larger than the sum of its proper divisors (5881850).

9899542 is a wasteful number, since it uses less digits than its factorization.

9899542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103.

The product of its digits is 233280, while the sum is 46.

The square root of 9899542 is about 3146.3537626910. The cubic root of 9899542 is about 214.7196056355.

The spelling of 9899542 in words is "nine million, eight hundred ninety-nine thousand, five hundred forty-two".