606121621 has 24 divisors (see below), whose sum is σ = 760696920. Its totient is φ = 479711232.

The previous prime is 606121613. The next prime is 606121631. The reversal of 606121621 is 126121606.

It can be written as a sum of positive squares in 4 ways, for example, as 186322500 + 419799121 = 13650^2 + 20489^2 .

It is not a de Polignac number, because 606121621 - 2³ = 606121613 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 (606121631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37285 + ... + 51013.

It is an arithmetic number, because the mean of its divisors is an integer number (31695705).

Almost surely, 2^606121621 is an apocalyptic number.

It is an amenable number.

606121621 is a deficient number, since it is larger than the sum of its proper divisors (154575299).

606121621 is a wasteful number, since it uses less digits than its factorization.

606121621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13813 (or 13806 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 606121621 is about 24619.5373839559. The cubic root of 606121621 is about 846.2913955955.

The spelling of 606121621 in words is "six hundred six million, one hundred twenty-one thousand, six hundred twenty-one".