605311921 has 8 divisors (see below), whose sum is σ = 625169664. Its totient is φ = 585474960.

The previous prime is 605311871. The next prime is 605311939. The reversal of 605311921 is 129113506.

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 605311921 - 2¹⁵ = 605279153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 605311921.

It is not an unprimeable number, because it can be changed into a prime (605311951) 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, 72846 + ... + 80728.

It is an arithmetic number, because the mean of its divisors is an integer number (78146208).

Almost surely, 2^605311921 is an apocalyptic number.

It is an amenable number.

605311921 is a deficient number, since it is larger than the sum of its proper divisors (19857743).

605311921 is a wasteful number, since it uses less digits than its factorization.

605311921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10391.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 605311921 is about 24603.0876314336. The cubic root of 605311921 is about 845.9143824255.

The spelling of 605311921 in words is "six hundred five million, three hundred eleven thousand, nine hundred twenty-one".