83712447 has 80 divisors (see below), whose sum is σ = 158233152. Its totient is φ = 42923520.

The previous prime is 83712401. The next prime is 83712449. The reversal of 83712447 is 74421738.

It is a happy number.

It is not a de Polignac number, because 83712447 - 2¹² = 83708351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83712449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 302073 + ... + 302349.

Almost surely, 2^83712447 is an apocalyptic number.

83712447 is a deficient number, since it is larger than the sum of its proper divisors (74520705).

83712447 is a wasteful number, since it uses less digits than its factorization.

83712447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 341 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 83712447 is about 9149.4506392461. The cubic root of 83712447 is about 437.4516030274.

The spelling of 83712447 in words is "eighty-three million, seven hundred twelve thousand, four hundred forty-seven".