304987 has 4 divisors (see below), whose sum is σ = 307800. Its totient is φ = 302176.

The previous prime is 304981. The next prime is 305017. The reversal of 304987 is 789403.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789403 = 191 ⋅4133.

It is a cyclic number.

It is not a de Polignac number, because 304987 - 2³ = 304979 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304981) 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, 1237 + ... + 1462.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2³⁰⁴⁹⁸⁷ is an apocalyptic number.

304987 is a deficient number, since it is larger than the sum of its proper divisors (2813).

304987 is a wasteful number, since it uses less digits than its factorization.

304987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812.

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

The square root of 304987 is about 552.2562810870. The cubic root of 304987 is about 67.3121985973.

Subtracting 304987 from its reverse (789403), we obtain a square (484416 = 696²).

It can be divided in two parts, 3049 and 87, that added together give a square (3136 = 56²).

The spelling of 304987 in words is "three hundred four thousand, nine hundred eighty-seven".