609909906 has 32 divisors (see below), whose sum is σ = 1278627840. Its totient is φ = 193582224.

The previous prime is 609909877. The next prime is 609909947.

609909906 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20865 + ... + 40683.

It is an arithmetic number, because the mean of its divisors is an integer number (39957120).

Almost surely, 2^609909906 is an apocalyptic number.

609909906 is an abundant number, since it is smaller than the sum of its proper divisors (668717934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

609909906 is a wasteful number, since it uses less digits than its factorization.

609909906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20070.

The product of its (nonzero) digits is 236196, while the sum is 48.

The square root of 609909906 is about 24696.3541033894. The cubic root of 609909906 is about 848.0508537573.

The spelling of 609909906 in words is "six hundred nine million, nine hundred nine thousand, nine hundred six".