28807647149 has 2 divisors, whose sum is σ = 28807647150. Its totient is φ = 28807647148.

The previous prime is 28807647133. The next prime is 28807647163. The reversal of 28807647149 is 94174670882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19453275625 + 9354371524 = 139475^2 + 96718^2 .

It is a cyclic number.

It is not a de Polignac number, because 28807647149 - 2⁴ = 28807647133 is a prime.

It is a super-2 number, since 2×28807647149² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28807647094 and 28807647103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28807647949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403823574 + 14403823575.

It is an arithmetic number, because the mean of its divisors is an integer number (14403823575).

Almost surely, 2^28807647149 is an apocalyptic number.

It is an amenable number.

28807647149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807647149 is an equidigital number, since it uses as much as digits as its factorization.

28807647149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 28807647149 in words is "twenty-eight billion, eight hundred seven million, six hundred forty-seven thousand, one hundred forty-nine".