28312972141 has 2 divisors, whose sum is σ = 28312972142. Its totient is φ = 28312972140.

The previous prime is 28312972139. The next prime is 28312972153. The reversal of 28312972141 is 14127921382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28163888041 + 149084100 = 167821^2 + 12210^2 .

It is a cyclic number.

It is not a de Polignac number, because 28312972141 - 2¹ = 28312972139 is a prime.

Together with 28312972139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28312972094 and 28312972103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28312970141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14156486070 + 14156486071.

It is an arithmetic number, because the mean of its divisors is an integer number (14156486071).

Almost surely, 2^28312972141 is an apocalyptic number.

It is an amenable number.

28312972141 is a deficient number, since it is larger than the sum of its proper divisors (1).

28312972141 is an equidigital number, since it uses as much as digits as its factorization.

28312972141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The spelling of 28312972141 in words is "twenty-eight billion, three hundred twelve million, nine hundred seventy-two thousand, one hundred forty-one".