28713317 has 2 divisors, whose sum is σ = 28713318. Its totient is φ = 28713316.

The previous prime is 28713301. The next prime is 28713331. The reversal of 28713317 is 71331782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28238596 + 474721 = 5314^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 28713317 - 2⁴ = 28713301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28713337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14356658 + 14356659.

It is an arithmetic number, because the mean of its divisors is an integer number (14356659).

Almost surely, 2^28713317 is an apocalyptic number.

It is an amenable number.

28713317 is a deficient number, since it is larger than the sum of its proper divisors (1).

28713317 is an equidigital number, since it uses as much as digits as its factorization.

28713317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 28713317 is about 5358.4808481509. The cubic root of 28713317 is about 306.2159361252.

The spelling of 28713317 in words is "twenty-eight million, seven hundred thirteen thousand, three hundred seventeen".