28247861069 has 2 divisors, whose sum is σ = 28247861070. Its totient is φ = 28247861068.

The previous prime is 28247861009. The next prime is 28247861071. The reversal of 28247861069 is 96016874282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28203171844 + 44689225 = 167938^2 + 6685^2 .

It is a cyclic number.

It is not a de Polignac number, because 28247861069 - 2⁸ = 28247860813 is a prime.

It is a super-2 number, since 2×28247861069² (a number of 22 digits) contains 22 as substring.

Together with 28247861071, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28247861069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28247861009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14123930534 + 14123930535.

It is an arithmetic number, because the mean of its divisors is an integer number (14123930535).

Almost surely, 2^28247861069 is an apocalyptic number.

It is an amenable number.

28247861069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28247861069 is an equidigital number, since it uses as much as digits as its factorization.

28247861069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 28247861069 in words is "twenty-eight billion, two hundred forty-seven million, eight hundred sixty-one thousand, sixty-nine".