978599321 has 8 divisors (see below), whose sum is σ = 1119102144. Its totient is φ = 838272240.

The previous prime is 978599309. The next prime is 978599329. The reversal of 978599321 is 123995879.

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 978599321 - 2⁶ = 978599257 is a prime.

It is a super-2 number, since 2×978599321² = 1915313262123322082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978599329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31775 + ... + 54468.

It is an arithmetic number, because the mean of its divisors is an integer number (139887768).

Almost surely, 2^978599321 is an apocalyptic number.

It is an amenable number.

978599321 is a deficient number, since it is larger than the sum of its proper divisors (140502823).

978599321 is a wasteful number, since it uses less digits than its factorization.

978599321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87871.

The product of its digits is 1224720, while the sum is 53.

The square root of 978599321 is about 31282.5721608694. The cubic root of 978599321 is about 992.8149388731.

The spelling of 978599321 in words is "nine hundred seventy-eight million, five hundred ninety-nine thousand, three hundred twenty-one".