28542021929 has 2 divisors, whose sum is σ = 28542021930. Its totient is φ = 28542021928.

The previous prime is 28542021913. The next prime is 28542021931. The reversal of 28542021929 is 92912024582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27620778025 + 921243904 = 166195^2 + 30352^2 .

It is a cyclic number.

It is not a de Polignac number, because 28542021929 - 2⁴ = 28542021913 is a prime.

Together with 28542021931, 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 28542021929.

It is not a weakly prime, because it can be changed into another prime (28542020929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14271010964 + 14271010965.

It is an arithmetic number, because the mean of its divisors is an integer number (14271010965).

Almost surely, 2^28542021929 is an apocalyptic number.

It is an amenable number.

28542021929 is a deficient number, since it is larger than the sum of its proper divisors (1).

28542021929 is an equidigital number, since it uses as much as digits as its factorization.

28542021929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 28542021929 in words is "twenty-eight billion, five hundred forty-two million, twenty-one thousand, nine hundred twenty-nine".