987403 has 4 divisors (see below), whose sum is σ = 1011528. Its totient is φ = 963280.

The previous prime is 987391. The next prime is 987433. The reversal of 987403 is 304789.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987403 - 2¹³ = 979211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (987433) 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, 12001 + ... + 12082.

It is an arithmetic number, because the mean of its divisors is an integer number (252882).

2⁹⁸⁷⁴⁰³ is an apocalyptic number.

987403 is a deficient number, since it is larger than the sum of its proper divisors (24125).

987403 is a wasteful number, since it uses less digits than its factorization.

987403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24124.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 987403 is about 993.6815385223. The cubic root of 987403 is about 99.5783243961.

The spelling of 987403 in words is "nine hundred eighty-seven thousand, four hundred three".