385508999 has 4 divisors (see below), whose sum is σ = 385553064. Its totient is φ = 385464936.

The previous prime is 385508989. The next prime is 385509001. The reversal of 385508999 is 999805583.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385508999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385508989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3977 + ... + 28050.

It is an arithmetic number, because the mean of its divisors is an integer number (96388266).

Almost surely, 2^385508999 is an apocalyptic number.

385508999 is a deficient number, since it is larger than the sum of its proper divisors (44065).

385508999 is a wasteful number, since it uses less digits than its factorization.

385508999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44064.

The product of its (nonzero) digits is 3499200, while the sum is 56.

The square root of 385508999 is about 19634.3830817268. The cubic root of 385508999 is about 727.7990875506.

The spelling of 385508999 in words is "three hundred eighty-five million, five hundred eight thousand, nine hundred ninety-nine".