605818421 has 4 divisors (see below), whose sum is σ = 652419852. Its totient is φ = 559216992.

The previous prime is 605818393. The next prime is 605818429. The reversal of 605818421 is 124818506.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 348568900 + 257249521 = 18670^2 + 16039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605818421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605818429) 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, 23300696 + ... + 23300721.

It is an arithmetic number, because the mean of its divisors is an integer number (163104963).

Almost surely, 2^605818421 is an apocalyptic number.

It is an amenable number.

605818421 is a deficient number, since it is larger than the sum of its proper divisors (46601431).

605818421 is a wasteful number, since it uses less digits than its factorization.

605818421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46601430.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 605818421 is about 24613.3789025400. The cubic root of 605818421 is about 846.1502587127.

The spelling of 605818421 in words is "six hundred five million, eight hundred eighteen thousand, four hundred twenty-one".