28273506013 has 2 divisors, whose sum is σ = 28273506014. Its totient is φ = 28273506012.

The previous prime is 28273505993. The next prime is 28273506031. The reversal of 28273506013 is 31060537282.

Together with next prime (28273506031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20536896249 + 7736609764 = 143307^2 + 87958^2 .

It is a cyclic number.

It is not a de Polignac number, because 28273506013 - 2⁹ = 28273505501 is a prime.

It is a super-2 number, since 2×28273506013² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28273506913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136753006 + 14136753007.

It is an arithmetic number, because the mean of its divisors is an integer number (14136753007).

Almost surely, 2^28273506013 is an apocalyptic number.

It is an amenable number.

28273506013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28273506013 is an equidigital number, since it uses as much as digits as its factorization.

28273506013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 28273506013 in words is "twenty-eight billion, two hundred seventy-three million, five hundred six thousand, thirteen".