321087617 has 8 divisors (see below), whose sum is σ = 328250880. Its totient is φ = 313981840.

The previous prime is 321087601. The next prime is 321087629. The reversal of 321087617 is 716780123.

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 321087617 - 2⁴ = 321087601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321087647) 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, 2978 + ... + 25515.

It is an arithmetic number, because the mean of its divisors is an integer number (41031360).

Almost surely, 2^321087617 is an apocalyptic number.

It is an amenable number.

321087617 is a deficient number, since it is larger than the sum of its proper divisors (7163263).

321087617 is a wasteful number, since it uses less digits than its factorization.

321087617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28743.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 321087617 is about 17918.9178523704. The cubic root of 321087617 is about 684.7644186076.

The spelling of 321087617 in words is "three hundred twenty-one million, eighty-seven thousand, six hundred seventeen".