847905149 has 16 divisors (see below), whose sum is σ = 1077242880. Its totient is φ = 649226880.

The previous prime is 847905137. The next prime is 847905151. The reversal of 847905149 is 941509748.

It is a cyclic number.

It is not a de Polignac number, because 847905149 - 2¹² = 847901053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847905119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147464 + ... + 153105.

It is an arithmetic number, because the mean of its divisors is an integer number (67327680).

Almost surely, 2^847905149 is an apocalyptic number.

It is an amenable number.

847905149 is a deficient number, since it is larger than the sum of its proper divisors (229337731).

847905149 is a wasteful number, since it uses less digits than its factorization.

847905149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300620.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 847905149 is about 29118.8109132224. The cubic root of 847905149 is about 946.4894065024.

The spelling of 847905149 in words is "eight hundred forty-seven million, nine hundred five thousand, one hundred forty-nine".