385923905 has 4 divisors (see below), whose sum is σ = 463108692. Its totient is φ = 308739120.

The previous prime is 385923893. The next prime is 385923907. The reversal of 385923905 is 509329583.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 203889841 + 182034064 = 14279^2 + 13492^2 .

It is not a de Polignac number, because 385923905 - 2⁶ = 385923841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385923907) 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, 38592386 + ... + 38592395.

It is an arithmetic number, because the mean of its divisors is an integer number (115777173).

Almost surely, 2^385923905 is an apocalyptic number.

It is an amenable number.

385923905 is a deficient number, since it is larger than the sum of its proper divisors (77184787).

385923905 is an equidigital number, since it uses as much as digits as its factorization.

385923905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77184786.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 385923905 is about 19644.9460421758. The cubic root of 385923905 is about 728.0600930801.

The spelling of 385923905 in words is "three hundred eighty-five million, nine hundred twenty-three thousand, nine hundred five".