805385387 has 4 divisors (see below), whose sum is σ = 852761016. Its totient is φ = 758009760.

The previous prime is 805385377. The next prime is 805385393. The reversal of 805385387 is 783583508.

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

It is a cyclic number.

It is not a de Polignac number, because 805385387 - 2⁶ = 805385323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805385377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23687789 + ... + 23687822.

It is an arithmetic number, because the mean of its divisors is an integer number (213190254).

Almost surely, 2^805385387 is an apocalyptic number.

805385387 is a deficient number, since it is larger than the sum of its proper divisors (47375629).

805385387 is a wasteful number, since it uses less digits than its factorization.

805385387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47375628.

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 805385387 is about 28379.3126590480. The cubic root of 805385387 is about 930.3961725979.

The spelling of 805385387 in words is "eight hundred five million, three hundred eighty-five thousand, three hundred eighty-seven".