847421523 has 24 divisors (see below), whose sum is σ = 1320453680. Its totient is φ = 520603200.

The previous prime is 847421503. The next prime is 847421537. The reversal of 847421523 is 325124748.

It is a happy number.

It is not a de Polignac number, because 847421523 - 2¹² = 847417427 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (847421503) 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, 66573 + ... + 78273.

Almost surely, 2^847421523 is an apocalyptic number.

847421523 is a deficient number, since it is larger than the sum of its proper divisors (473032157).

847421523 is a wasteful number, since it uses less digits than its factorization.

847421523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12339 (or 12336 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 847421523 is about 29110.5053717726. The cubic root of 847421523 is about 946.3094201980.

The spelling of 847421523 in words is "eight hundred forty-seven million, four hundred twenty-one thousand, five hundred twenty-three".