655345209 has 8 divisors (see below), whose sum is σ = 873966880. Its totient is φ = 436810176.

The previous prime is 655345193. The next prime is 655345213. The reversal of 655345209 is 902543556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 655345209 - 2⁴ = 655345193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655345259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264 + ... + 36225.

It is an arithmetic number, because the mean of its divisors is an integer number (109245860).

Almost surely, 2^655345209 is an apocalyptic number.

It is an amenable number.

655345209 is a deficient number, since it is larger than the sum of its proper divisors (218621671).

655345209 is a wasteful number, since it uses less digits than its factorization.

655345209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43319.

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 655345209 is about 25599.7111116512. The cubic root of 655345209 is about 868.6071026012.

The spelling of 655345209 in words is "six hundred fifty-five million, three hundred forty-five thousand, two hundred nine".