847385505 has 24 divisors (see below), whose sum is σ = 1475405568. Its totient is φ = 449906976.

The previous prime is 847385491. The next prime is 847385509. The reversal of 847385505 is 505583748.

It is not a de Polignac number, because 847385505 - 2¹⁶ = 847319969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (847385509) 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 23 ways as a sum of consecutive naturals, for example, 32187 + ... + 52256.

It is an arithmetic number, because the mean of its divisors is an integer number (61475232).

Almost surely, 2^847385505 is an apocalyptic number.

It is an amenable number.

847385505 is a deficient number, since it is larger than the sum of its proper divisors (628020063).

847385505 is a wasteful number, since it uses less digits than its factorization.

847385505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84677 (or 84674 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The square root of 847385505 is about 29109.8867225553. The cubic root of 847385505 is about 946.2960129956.

The spelling of 847385505 in words is "eight hundred forty-seven million, three hundred eighty-five thousand, five hundred five".