611320321 has 4 divisors (see below), whose sum is σ = 611393472. Its totient is φ = 611247172.

The previous prime is 611320313. The next prime is 611320337. The reversal of 611320321 is 123023116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 611320321 - 2³ = 611320313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611020321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22141 + ... + 41386.

It is an arithmetic number, because the mean of its divisors is an integer number (152848368).

Almost surely, 2^611320321 is an apocalyptic number.

It is an amenable number.

611320321 is a deficient number, since it is larger than the sum of its proper divisors (73151).

611320321 is an equidigital number, since it uses as much as digits as its factorization.

611320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73150.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 611320321 is about 24724.8927399089. The cubic root of 611320321 is about 848.7040556047.

Adding to 611320321 its reverse (123023116), we get a palindrome (734343437).

The spelling of 611320321 in words is "six hundred eleven million, three hundred twenty thousand, three hundred twenty-one".