28747068869 has 2 divisors, whose sum is σ = 28747068870. Its totient is φ = 28747068868.

The previous prime is 28747068829. The next prime is 28747068899. The reversal of 28747068869 is 96886074782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15790938244 + 12956130625 = 125662^2 + 113825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28747068869 is a prime.

It is a super-2 number, since 2×28747068869² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28747068829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14373534434 + 14373534435.

It is an arithmetic number, because the mean of its divisors is an integer number (14373534435).

Almost surely, 2^28747068869 is an apocalyptic number.

It is an amenable number.

28747068869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28747068869 is an equidigital number, since it uses as much as digits as its factorization.

28747068869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65028096, while the sum is 65.

The spelling of 28747068869 in words is "twenty-eight billion, seven hundred forty-seven million, sixty-eight thousand, eight hundred sixty-nine".