84631687 has 4 divisors (see below), whose sum is σ = 96721936. Its totient is φ = 72541440.

The previous prime is 84631669. The next prime is 84631693. The reversal of 84631687 is 78613648.

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 84631687 - 2¹¹ = 84629639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84631487) 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, 6045114 + ... + 6045127.

It is an arithmetic number, because the mean of its divisors is an integer number (24180484).

Almost surely, 2^84631687 is an apocalyptic number.

84631687 is a deficient number, since it is larger than the sum of its proper divisors (12090249).

84631687 is a wasteful number, since it uses less digits than its factorization.

84631687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12090248.

The product of its digits is 193536, while the sum is 43.

The square root of 84631687 is about 9199.5481954279. The cubic root of 84631687 is about 439.0469851797.

The spelling of 84631687 in words is "eighty-four million, six hundred thirty-one thousand, six hundred eighty-seven".