771128101 has 2 divisors, whose sum is σ = 771128102. Its totient is φ = 771128100.

The previous prime is 771128047. The next prime is 771128117. The reversal of 771128101 is 101821177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613751076 + 157377025 = 24774^2 + 12545^2 .

It is a cyclic number.

It is not a de Polignac number, because 771128101 - 2¹¹ = 771126053 is a prime.

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 771128101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (771128161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385564050 + 385564051.

It is an arithmetic number, because the mean of its divisors is an integer number (385564051).

Almost surely, 2^771128101 is an apocalyptic number.

It is an amenable number.

771128101 is a deficient number, since it is larger than the sum of its proper divisors (1).

771128101 is an equidigital number, since it uses as much as digits as its factorization.

771128101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 28.

The square root of 771128101 is about 27769.1933804351. The cubic root of 771128101 is about 917.0130368108.

Adding to 771128101 its reverse (101821177), we get a palindrome (872949278).

The spelling of 771128101 in words is "seven hundred seventy-one million, one hundred twenty-eight thousand, one hundred one".