606020821 has 4 divisors (see below), whose sum is σ = 692595232. Its totient is φ = 519446412.

The previous prime is 606020783. The next prime is 606020837. The reversal of 606020821 is 128020606.

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 606020821 - 2⁹ = 606020309 is a prime.

It is a super-2 number, since 2×606020821² = 734522470971028082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (606020851) 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, 43287195 + ... + 43287208.

It is an arithmetic number, because the mean of its divisors is an integer number (173148808).

Almost surely, 2^606020821 is an apocalyptic number.

It is an amenable number.

606020821 is a deficient number, since it is larger than the sum of its proper divisors (86574411).

606020821 is an equidigital number, since it uses as much as digits as its factorization.

606020821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86574410.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 606020821 is about 24617.4901442044. The cubic root of 606020821 is about 846.2444793227.

It can be divided in two parts, 606020 and 821, that added together give a square (606841 = 779²).

The spelling of 606020821 in words is "six hundred six million, twenty thousand, eight hundred twenty-one".