609865201 has 32 divisors (see below), whose sum is σ = 710341632. Its totient is φ = 518400000.

The previous prime is 609865199. The next prime is 609865213. The reversal of 609865201 is 102568906.

It is a 3-Lehmer number, since φ(609865201) divides (609865201-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 609865201 - 2¹ = 609865199 is a prime.

It is a deceptive number, since it divides R_609865200.

It is not an unprimeable number, because it can be changed into a prime (609865271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2530441 + ... + 2530681.

It is an arithmetic number, because the mean of its divisors is an integer number (22198176).

It is a Poulet number, since it divides 2^609865200-1.

Almost surely, 2^609865201 is an apocalyptic number.

It is an amenable number.

609865201 is a deficient number, since it is larger than the sum of its proper divisors (100476431).

609865201 is a wasteful number, since it uses less digits than its factorization.

609865201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 609865201 is about 24695.4489936911. The cubic root of 609865201 is about 848.0301331889.

The spelling of 609865201 in words is "six hundred nine million, eight hundred sixty-five thousand, two hundred one".