609742806 has 32 divisors (see below), whose sum is σ = 1264606560. Its totient is φ = 195761664.

The previous prime is 609742801. The next prime is 609742823. The reversal of 609742806 is 608247906.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609742801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71296 + ... + 79388.

It is an arithmetic number, because the mean of its divisors is an integer number (39518955).

Almost surely, 2^609742806 is an apocalyptic number.

609742806 is an abundant number, since it is smaller than the sum of its proper divisors (654863754).

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

609742806 is a wasteful number, since it uses less digits than its factorization.

609742806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 609742806 is about 24692.9707811758. The cubic root of 609742806 is about 847.9733984698.

The spelling of 609742806 in words is "six hundred nine million, seven hundred forty-two thousand, eight hundred six".