611078321 has 4 divisors (see below), whose sum is σ = 698375232. Its totient is φ = 523781412.

The previous prime is 611078317. The next prime is 611078357. The reversal of 611078321 is 123870116.

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 not a de Polignac number, because 611078321 - 2² = 611078317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (611078521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43648445 + ... + 43648458.

It is an arithmetic number, because the mean of its divisors is an integer number (174593808).

Almost surely, 2^611078321 is an apocalyptic number.

It is an amenable number.

611078321 is a deficient number, since it is larger than the sum of its proper divisors (87296911).

611078321 is an equidigital number, since it uses as much as digits as its factorization.

611078321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87296910.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 611078321 is about 24719.9984021035. The cubic root of 611078321 is about 848.5920502277.

The spelling of 611078321 in words is "six hundred eleven million, seventy-eight thousand, three hundred twenty-one".