28712713 has 2 divisors, whose sum is σ = 28712714. Its totient is φ = 28712712.

The previous prime is 28712699. The next prime is 28712753. The reversal of 28712713 is 31721782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 10419984 = 4277^2 + 3228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28712713 is a prime.

It is not a weakly prime, because it can be changed into another prime (28712753) 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 as a sum of consecutive naturals, namely, 14356356 + 14356357.

It is an arithmetic number, because the mean of its divisors is an integer number (14356357).

Almost surely, 2^28712713 is an apocalyptic number.

It is an amenable number.

28712713 is a deficient number, since it is larger than the sum of its proper divisors (1).

28712713 is an equidigital number, since it uses as much as digits as its factorization.

28712713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 28712713 is about 5358.4244885974. The cubic root of 28712713 is about 306.2137889714.

The spelling of 28712713 in words is "twenty-eight million, seven hundred twelve thousand, seven hundred thirteen".