28782921127 has 2 divisors, whose sum is σ = 28782921128. Its totient is φ = 28782921126.

The previous prime is 28782921103. The next prime is 28782921131. The reversal of 28782921127 is 72112928782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28782921127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28782921197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14391460563 + 14391460564.

It is an arithmetic number, because the mean of its divisors is an integer number (14391460564).

Almost surely, 2^28782921127 is an apocalyptic number.

28782921127 is a deficient number, since it is larger than the sum of its proper divisors (1).

28782921127 is an equidigital number, since it uses as much as digits as its factorization.

28782921127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 49.

The spelling of 28782921127 in words is "twenty-eight billion, seven hundred eighty-two million, nine hundred twenty-one thousand, one hundred twenty-seven".