2839729 has 4 divisors (see below), whose sum is σ = 2887920. Its totient is φ = 2791540.

The previous prime is 2839699. The next prime is 2839747. The reversal of 2839729 is 9279382.

2839729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2839729 - 2⁷ = 2839601 is a prime.

It is a Duffinian number.

2839729 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2839691 and 2839700.

It is not an unprimeable number, because it can be changed into a prime (2839769) 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, 24007 + ... + 24124.

It is an arithmetic number, because the mean of its divisors is an integer number (721980).

2^2839729 is an apocalyptic number.

It is an amenable number.

2839729 is a deficient number, since it is larger than the sum of its proper divisors (48191).

2839729 is an equidigital number, since it uses as much as digits as its factorization.

2839729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48190.

The product of its digits is 54432, while the sum is 40.

The square root of 2839729 is about 1685.1495482597. The cubic root of 2839729 is about 141.6094704902.

The spelling of 2839729 in words is "two million, eight hundred thirty-nine thousand, seven hundred twenty-nine".