3147729 has 16 divisors (see below), whose sum is σ = 4627392. Its totient is φ = 1891008.

The previous prime is 3147721. The next prime is 3147751. The reversal of 3147729 is 9277413.

It is not a de Polignac number, because 3147729 - 2³ = 3147721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3147729.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3147721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (289212).

Almost surely, 2^3147729 is an apocalyptic number.

3147729 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3147729 is a deficient number, since it is larger than the sum of its proper divisors (1479663).

3147729 is a wasteful number, since it uses less digits than its factorization.

3147729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936.

The product of its digits is 10584, while the sum is 33.

The square root of 3147729 is about 1774.1840378044. The cubic root of 3147729 is about 146.5544843491.

The spelling of 3147729 in words is "three million, one hundred forty-seven thousand, seven hundred twenty-nine".