618939321 has 96 divisors (see below), whose sum is σ = 1146157824. Its totient is φ = 288921600.

The previous prime is 618939319. The next prime is 618939329. The reversal of 618939321 is 123939816.

It is not a de Polignac number, because 618939321 - 2¹ = 618939319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618939329) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1354125 + ... + 1354581.

It is an arithmetic number, because the mean of its divisors is an integer number (11939144).

Almost surely, 2^618939321 is an apocalyptic number.

It is an amenable number.

618939321 is a deficient number, since it is larger than the sum of its proper divisors (527218503).

618939321 is a wasteful number, since it uses less digits than its factorization.

618939321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543 (or 532 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 618939321 is about 24878.4911318995. The cubic root of 618939321 is about 852.2153610954.

It can be divided in two parts, 618 and 939321, that added together give a palindrome (939939).

The spelling of 618939321 in words is "six hundred eighteen million, nine hundred thirty-nine thousand, three hundred twenty-one".