9987434 has 8 divisors (see below), whose sum is σ = 15037248. Its totient is φ = 4975020.

The previous prime is 9987433. The next prime is 9987443. The reversal of 9987434 is 4347899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9987433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8672 + ... + 9755.

It is an arithmetic number, because the mean of its divisors is an integer number (1879656).

Almost surely, 2^9987434 is an apocalyptic number.

9987434 is a deficient number, since it is larger than the sum of its proper divisors (5049814).

9987434 is a wasteful number, since it uses less digits than its factorization.

9987434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18700.

The product of its digits is 217728, while the sum is 44.

The square root of 9987434 is about 3160.2901765502. The cubic root of 9987434 is about 215.3531890897.

The spelling of 9987434 in words is "nine million, nine hundred eighty-seven thousand, four hundred thirty-four".