987429 has 4 divisors (see below), whose sum is σ = 1316576. Its totient is φ = 658284.

The previous prime is 987391. The next prime is 987433. The reversal of 987429 is 924789.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 924789 = 3 ⋅308263.

It is a de Polignac number, because none of the positive numbers 2^k-987429 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164569 + ... + 164574.

It is an arithmetic number, because the mean of its divisors is an integer number (329144).

2⁹⁸⁷⁴²⁹ is an apocalyptic number.

It is an amenable number.

987429 is a deficient number, since it is larger than the sum of its proper divisors (329147).

987429 is a wasteful number, since it uses less digits than its factorization.

987429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329146.

The product of its digits is 36288, while the sum is 39.

The square root of 987429 is about 993.6946210985. The cubic root of 987429 is about 99.5791984107.

The spelling of 987429 in words is "nine hundred eighty-seven thousand, four hundred twenty-nine".