3130729 has 4 divisors (see below), whose sum is σ = 3577984. Its totient is φ = 2683476.

The previous prime is 3130711. The next prime is 3130733. The reversal of 3130729 is 9270313.

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 a de Polignac number, because none of the positive numbers 2^k-3130729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3130739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223617 + ... + 223630.

It is an arithmetic number, because the mean of its divisors is an integer number (894496).

Almost surely, 2^3130729 is an apocalyptic number.

It is an amenable number.

3130729 is a deficient number, since it is larger than the sum of its proper divisors (447255).

3130729 is an equidigital number, since it uses as much as digits as its factorization.

3130729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447254.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3130729 is about 1769.3866168817. The cubic root of 3130729 is about 146.2901747570.

The spelling of 3130729 in words is "three million, one hundred thirty thousand, seven hundred twenty-nine".