28807647133 has 2 divisors, whose sum is σ = 28807647134. Its totient is φ = 28807647132.

The previous prime is 28807647103. The next prime is 28807647149. The reversal of 28807647133 is 33174670882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21825039289 + 6982607844 = 147733^2 + 83562^2 .

It is a cyclic number.

It is not a de Polignac number, because 28807647133 - 2¹³ = 28807638941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28807647103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403823566 + 14403823567.

It is an arithmetic number, because the mean of its divisors is an integer number (14403823567).

Almost surely, 2^28807647133 is an apocalyptic number.

It is an amenable number.

28807647133 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807647133 is an equidigital number, since it uses as much as digits as its factorization.

28807647133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 28807647133 in words is "twenty-eight billion, eight hundred seven million, six hundred forty-seven thousand, one hundred thirty-three".