30987321 has 8 divisors (see below), whose sum is σ = 42649344. Its totient is φ = 19991760.

The previous prime is 30987301. The next prime is 30987337. The reversal of 30987321 is 12378903.

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

It is not a de Polignac number, because 30987321 - 2⁵ = 30987289 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (30987301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166506 + ... + 166691.

It is an arithmetic number, because the mean of its divisors is an integer number (5331168).

Almost surely, 2^30987321 is an apocalyptic number.

30987321 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30987321 is a deficient number, since it is larger than the sum of its proper divisors (11662023).

30987321 is a wasteful number, since it uses less digits than its factorization.

30987321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333231.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 30987321 is about 5566.6256385714. The cubic root of 30987321 is about 314.0952319094.

The spelling of 30987321 in words is "thirty million, nine hundred eighty-seven thousand, three hundred twenty-one".