8842729 has 4 divisors (see below), whose sum is σ = 10105984. Its totient is φ = 7579476.

The previous prime is 8842699. The next prime is 8842747. The reversal of 8842729 is 9272488.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8842729 - 2⁵ = 8842697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8842691 and 8842700.

It is not an unprimeable number, because it can be changed into a prime (8843729) 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, 631617 + ... + 631630.

It is an arithmetic number, because the mean of its divisors is an integer number (2526496).

Almost surely, 2^8842729 is an apocalyptic number.

It is an amenable number.

8842729 is a deficient number, since it is larger than the sum of its proper divisors (1263255).

8842729 is a wasteful number, since it uses less digits than its factorization.

8842729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263254.

The product of its digits is 64512, while the sum is 40.

The square root of 8842729 is about 2973.6726450637. The cubic root of 8842729 is about 206.7896374756.

The spelling of 8842729 in words is "eight million, eight hundred forty-two thousand, seven hundred twenty-nine".