1028100077 has 2 divisors, whose sum is σ = 1028100078. Its totient is φ = 1028100076.

The previous prime is 1028100053. The next prime is 1028100079. The reversal of 1028100077 is 7700018201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 944578756 + 83521321 = 30734^2 + 9139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028100077 - 2¹⁶ = 1028034541 is a prime.

Together with 1028100079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1028100079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514050038 + 514050039.

It is an arithmetic number, because the mean of its divisors is an integer number (514050039).

Almost surely, 2^1028100077 is an apocalyptic number.

It is an amenable number.

1028100077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028100077 is an equidigital number, since it uses as much as digits as its factorization.

1028100077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1028100077 is about 32063.9997037176. Note that the first 3 decimals coincide. The cubic root of 1028100077 is about 1009.2803019109.

Adding to 1028100077 its reverse (7700018201), we get a palindrome (8728118278).

The spelling of 1028100077 in words is "one billion, twenty-eight million, one hundred thousand, seventy-seven".