28212713 has 2 divisors, whose sum is σ = 28212714. Its totient is φ = 28212712.

The previous prime is 28212661. The next prime is 28212719. The reversal of 28212713 is 31721282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25938649 + 2274064 = 5093^2 + 1508^2 .

It is a cyclic number.

It is not a de Polignac number, because 28212713 - 2¹⁸ = 27950569 is a prime.

It is not a weakly prime, because it can be changed into another prime (28212719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14106356 + 14106357.

It is an arithmetic number, because the mean of its divisors is an integer number (14106357).

Almost surely, 2^28212713 is an apocalyptic number.

It is an amenable number.

28212713 is a deficient number, since it is larger than the sum of its proper divisors (1).

28212713 is an equidigital number, since it uses as much as digits as its factorization.

28212713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 28212713 is about 5311.5640822643. The cubic root of 28212713 is about 304.4259128446.

Adding to 28212713 its reverse (31721282), we get a palindrome (59933995).

The spelling of 28212713 in words is "twenty-eight million, two hundred twelve thousand, seven hundred thirteen".