84631729 has 32 divisors (see below), whose sum is σ = 111234816. Its totient is φ = 62484480.

The previous prime is 84631727. The next prime is 84631753. The reversal of 84631729 is 92713648.

It is a cyclic number.

It is not a de Polignac number, because 84631729 - 2¹ = 84631727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84631691 and 84631700.

It is not an unprimeable number, because it can be changed into a prime (84631721) 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 31 ways as a sum of consecutive naturals, for example, 351049 + ... + 351289.

It is an arithmetic number, because the mean of its divisors is an integer number (3476088).

Almost surely, 2^84631729 is an apocalyptic number.

It is an amenable number.

84631729 is a deficient number, since it is larger than the sum of its proper divisors (26603087).

84631729 is a wasteful number, since it uses less digits than its factorization.

84631729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its digits is 72576, while the sum is 40.

The square root of 84631729 is about 9199.5504781484. The cubic root of 84631729 is about 439.0470578081.

The spelling of 84631729 in words is "eighty-four million, six hundred thirty-one thousand, seven hundred twenty-nine".