6739729 has 4 divisors (see below), whose sum is σ = 6770176. Its totient is φ = 6709284.

The previous prime is 6739723. The next prime is 6739751. The reversal of 6739729 is 9279376.

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 6739729 - 2¹³ = 6731537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6739723) 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, 14889 + ... + 15334.

It is an arithmetic number, because the mean of its divisors is an integer number (1692544).

Almost surely, 2^6739729 is an apocalyptic number.

It is an amenable number.

6739729 is a deficient number, since it is larger than the sum of its proper divisors (30447).

6739729 is a wasteful number, since it uses less digits than its factorization.

6739729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30446.

The product of its digits is 142884, while the sum is 43.

The square root of 6739729 is about 2596.0988039749. The cubic root of 6739729 is about 188.8922521636.

The spelling of 6739729 in words is "six million, seven hundred thirty-nine thousand, seven hundred twenty-nine".