605420391 has 8 divisors (see below), whose sum is σ = 826915824. Its totient is φ = 393769280.

The previous prime is 605420363. The next prime is 605420411. The reversal of 605420391 is 193024506.

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 605420391 - 2²³ = 597031783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605420311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2460936 + ... + 2461181.

It is an arithmetic number, because the mean of its divisors is an integer number (103364478).

Almost surely, 2^605420391 is an apocalyptic number.

605420391 is a deficient number, since it is larger than the sum of its proper divisors (221495433).

605420391 is a wasteful number, since it uses less digits than its factorization.

605420391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922161.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 605420391 is about 24605.2919308022. The cubic root of 605420391 is about 845.9649078101.

Adding to 605420391 its reverse (193024506), we get a palindrome (798444897).

The spelling of 605420391 in words is "six hundred five million, four hundred twenty thousand, three hundred ninety-one".