987447 has 8 divisors (see below), whose sum is σ = 1321344. Its totient is φ = 655928.

The previous prime is 987433. The next prime is 987457. The reversal of 987447 is 744789.

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

It is a cyclic number.

It is not a de Polignac number, because 987447 - 2⁶ = 987383 is a prime.

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 (987457) 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 7 ways as a sum of consecutive naturals, for example, 958 + ... + 1700.

It is an arithmetic number, because the mean of its divisors is an integer number (165168).

2⁹⁸⁷⁴⁴⁷ is an apocalyptic number.

987447 is a deficient number, since it is larger than the sum of its proper divisors (333897).

987447 is a wasteful number, since it uses less digits than its factorization.

987447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189.

The product of its digits is 56448, while the sum is 39.

The square root of 987447 is about 993.7036781657. The cubic root of 987447 is about 99.5798034887.

The spelling of 987447 in words is "nine hundred eighty-seven thousand, four hundred forty-seven".