28147693529069 has 2 divisors, whose sum is σ = 28147693529070. Its totient is φ = 28147693529068.

The previous prime is 28147693529051. The next prime is 28147693529141. The reversal of 28147693529069 is 96092539674182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26405723822500 + 1741969706569 = 5138650^2 + 1319837^2 .

It is a cyclic number.

It is not a de Polignac number, because 28147693529069 - 2³⁶ = 28078974052333 is a prime.

It is a super-2 number, since 2×28147693529069² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28147693528993 and 28147693529011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28147693529569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14073846764534 + 14073846764535.

It is an arithmetic number, because the mean of its divisors is an integer number (14073846764535).

It is a 1-persistent number, because it is pandigital, but 2⋅28147693529069 = 56295387058138 is not.

Almost surely, 2^{28147693529069} is an apocalyptic number.

It is an amenable number.

28147693529069 is a deficient number, since it is larger than the sum of its proper divisors (1).

28147693529069 is an equidigital number, since it uses as much as digits as its factorization.

28147693529069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 352719360, while the sum is 71.

The spelling of 28147693529069 in words is "twenty-eight trillion, one hundred forty-seven billion, six hundred ninety-three million, five hundred twenty-nine thousand, sixty-nine".