9429987 has 16 divisors (see below), whose sum is σ = 14431232. Its totient is φ = 5365440.

The previous prime is 9429967. The next prime is 9429997. The reversal of 9429987 is 7899249.

It is a happy number.

It is not a de Polignac number, because 9429987 - 2⁶ = 9429923 is a prime.

It is a Duffinian number.

9429987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9429907) 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, 4863 + ... + 6519.

It is an arithmetic number, because the mean of its divisors is an integer number (901952).

Almost surely, 2^9429987 is an apocalyptic number.

9429987 is a deficient number, since it is larger than the sum of its proper divisors (5001245).

9429987 is a wasteful number, since it uses less digits than its factorization.

9429987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938.

The product of its digits is 326592, while the sum is 48.

The square root of 9429987 is about 3070.8283898649. The cubic root of 9429987 is about 211.2696103546.

Adding to 9429987 its product of digits (326592), we get a palindrome (9756579).

The spelling of 9429987 in words is "nine million, four hundred twenty-nine thousand, nine hundred eighty-seven".