1375768769 has 2 divisors, whose sum is σ = 1375768770. Its totient is φ = 1375768768.

The previous prime is 1375768733. The next prime is 1375768783. The reversal of 1375768769 is 9678675731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1369888144 + 5880625 = 37012^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375768769 - 2²⁴ = 1358991553 is a prime.

It is a super-2 number, since 2×1375768769² = 3785479411511550722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1375768799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687884384 + 687884385.

It is an arithmetic number, because the mean of its divisors is an integer number (687884385).

Almost surely, 2^1375768769 is an apocalyptic number.

It is an amenable number.

1375768769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375768769 is an equidigital number, since it uses as much as digits as its factorization.

1375768769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13335840, while the sum is 59.

The square root of 1375768769 is about 37091.3570660336. The cubic root of 1375768769 is about 1112.1972463041.

The spelling of 1375768769 in words is "one billion, three hundred seventy-five million, seven hundred sixty-eight thousand, seven hundred sixty-nine".