1012128769 has 2 divisors, whose sum is σ = 1012128770. Its totient is φ = 1012128768.

The previous prime is 1012128763. The next prime is 1012128773. The reversal of 1012128769 is 9678212101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863654544 + 148474225 = 29388^2 + 12185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012128769 - 2¹¹ = 1012126721 is a prime.

It is a super-2 number, since 2×1012128769² = 2048809290074910722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1012128763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506064384 + 506064385.

It is an arithmetic number, because the mean of its divisors is an integer number (506064385).

Almost surely, 2^1012128769 is an apocalyptic number.

It is an amenable number.

1012128769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012128769 is an equidigital number, since it uses as much as digits as its factorization.

1012128769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1012128769 is about 31813.9712862132. The cubic root of 1012128769 is about 1004.0266870284.

The spelling of 1012128769 in words is "one billion, twelve million, one hundred twenty-eight thousand, seven hundred sixty-nine".