84529729 has 4 divisors (see below), whose sum is σ = 89502084. Its totient is φ = 79557376.

The previous prime is 84529723. The next prime is 84529789. The reversal of 84529729 is 92792548.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58110129 + 26419600 = 7623^2 + 5140^2 .

It is a cyclic number.

It is not a de Polignac number, because 84529729 - 2³ = 84529721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84529721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2486152 + ... + 2486185.

It is an arithmetic number, because the mean of its divisors is an integer number (22375521).

Almost surely, 2^84529729 is an apocalyptic number.

It is an amenable number.

84529729 is a deficient number, since it is larger than the sum of its proper divisors (4972355).

84529729 is a wasteful number, since it uses less digits than its factorization.

84529729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4972354.

The product of its digits is 362880, while the sum is 46.

The square root of 84529729 is about 9194.0050576449. The cubic root of 84529729 is about 438.8706038802.

It can be divided in two parts, 84529 and 729, that added together give a palindrome (85258).

The spelling of 84529729 in words is "eighty-four million, five hundred twenty-nine thousand, seven hundred twenty-nine".