609204865 has 16 divisors (see below), whose sum is σ = 760326336. Its totient is φ = 468216000.

The previous prime is 609204863. The next prime is 609204881. The reversal of 609204865 is 568402906.

It is a happy number.

It is not a de Polignac number, because 609204865 - 2¹ = 609204863 is a prime.

It is a super-2 number, since 2×609204865² = 742261135079336450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609204863) 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, 10111 + ... + 36340.

It is an arithmetic number, because the mean of its divisors is an integer number (47520396).

Almost surely, 2^609204865 is an apocalyptic number.

It is an amenable number.

609204865 is a deficient number, since it is larger than the sum of its proper divisors (151121471).

609204865 is a wasteful number, since it uses less digits than its factorization.

609204865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46560.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 609204865 is about 24682.0757838558. The cubic root of 609204865 is about 847.7239523826.

The spelling of 609204865 in words is "six hundred nine million, two hundred four thousand, eight hundred sixty-five".