606992221 has 8 divisors (see below), whose sum is σ = 697024800. Its totient is φ = 522768240.

The previous prime is 606992219. The next prime is 606992227. The reversal of 606992221 is 122299606.

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 606992221 - 2¹ = 606992219 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 (606992227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451926 + ... + 1452343.

It is an arithmetic number, because the mean of its divisors is an integer number (87128100).

Almost surely, 2^606992221 is an apocalyptic number.

It is an amenable number.

606992221 is a deficient number, since it is larger than the sum of its proper divisors (90032579).

606992221 is a wasteful number, since it uses less digits than its factorization.

606992221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904299.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 606992221 is about 24637.2121190690. The cubic root of 606992221 is about 846.6963906698.

The spelling of 606992221 in words is "six hundred six million, nine hundred ninety-two thousand, two hundred twenty-one".