606391 has 6 divisors (see below), whose sum is σ = 627576. Its totient is φ = 585900.

The previous prime is 606383. The next prime is 606413. The reversal of 606391 is 193606.

It is not a de Polignac number, because 606391 - 2³ = 606383 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 (606301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 646 + ... + 1276.

It is an arithmetic number, because the mean of its divisors is an integer number (104596).

2⁶⁰⁶³⁹¹ is an apocalyptic number.

606391 is the 493-rd centered pentagonal number.

606391 is a deficient number, since it is larger than the sum of its proper divisors (21185).

606391 is an equidigital number, since it uses as much as digits as its factorization.

606391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 606391 is about 778.7111145990. The cubic root of 606391 is about 84.6416749627.

Adding to 606391 its reverse (193606), we get a palindrome (799997).

The spelling of 606391 in words is "six hundred six thousand, three hundred ninety-one".