385753209 has 4 divisors (see below), whose sum is σ = 514337616. Its totient is φ = 257168804.

The previous prime is 385753201. The next prime is 385753213. The reversal of 385753209 is 902357583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 385753209 - 2³ = 385753201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (385753201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64292199 + ... + 64292204.

It is an arithmetic number, because the mean of its divisors is an integer number (128584404).

Almost surely, 2^385753209 is an apocalyptic number.

It is an amenable number.

385753209 is a deficient number, since it is larger than the sum of its proper divisors (128584407).

385753209 is a wasteful number, since it uses less digits than its factorization.

385753209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128584406.

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 385753209 is about 19640.6010345916. The cubic root of 385753209 is about 727.9527357563.

The spelling of 385753209 in words is "three hundred eighty-five million, seven hundred fifty-three thousand, two hundred nine".