605938721 has 4 divisors (see below), whose sum is σ = 606396672. Its totient is φ = 605480772.

The previous prime is 605938699. The next prime is 605938777. The reversal of 605938721 is 127839506.

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 605938721 - 2¹⁰ = 605937697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (605938621) 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, 226985 + ... + 229638.

It is an arithmetic number, because the mean of its divisors is an integer number (151599168).

Almost surely, 2^605938721 is an apocalyptic number.

It is an amenable number.

605938721 is a deficient number, since it is larger than the sum of its proper divisors (457951).

605938721 is a wasteful number, since it uses less digits than its factorization.

605938721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457950.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 605938721 is about 24615.8225741087. The cubic root of 605938721 is about 846.2062629188.

The spelling of 605938721 in words is "six hundred five million, nine hundred thirty-eight thousand, seven hundred twenty-one".