605712391 has 2 divisors, whose sum is σ = 605712392. Its totient is φ = 605712390.

The previous prime is 605712389. The next prime is 605712413. The reversal of 605712391 is 193217506.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 605712391 - 2¹ = 605712389 is a prime.

It is a super-2 number, since 2×605712391² = 733775001221873762, which contains 22 as substring.

Together with 605712389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (605712301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302856195 + 302856196.

It is an arithmetic number, because the mean of its divisors is an integer number (302856196).

Almost surely, 2^605712391 is an apocalyptic number.

605712391 is a deficient number, since it is larger than the sum of its proper divisors (1).

605712391 is an equidigital number, since it uses as much as digits as its factorization.

605712391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 605712391 is about 24611.2248984076. The cubic root of 605712391 is about 846.1008915847.

Adding to 605712391 its reverse (193217506), we get a palindrome (798929897).

The spelling of 605712391 in words is "six hundred five million, seven hundred twelve thousand, three hundred ninety-one".