609538621 has 16 divisors (see below), whose sum is σ = 656812800. Its totient is φ = 563592960.

The previous prime is 609538613. The next prime is 609538627. The reversal of 609538621 is 126835906.

It is a cyclic number.

It is not a de Polignac number, because 609538621 - 2³ = 609538613 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 (609538627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 420520 + ... + 421966.

It is an arithmetic number, because the mean of its divisors is an integer number (41050800).

Almost surely, 2^609538621 is an apocalyptic number.

It is an amenable number.

609538621 is a deficient number, since it is larger than the sum of its proper divisors (47274179).

609538621 is a wasteful number, since it uses less digits than its factorization.

609538621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 609538621 is about 24688.8359587891. The cubic root of 609538621 is about 847.8787340872.

The spelling of 609538621 in words is "six hundred nine million, five hundred thirty-eight thousand, six hundred twenty-one".