1375096781 has 2 divisors, whose sum is σ = 1375096782. Its totient is φ = 1375096780.

The previous prime is 1375096721. The next prime is 1375096817. The reversal of 1375096781 is 1876905731.

Together with next prime (1375096817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1067655625 + 307441156 = 32675^2 + 17534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375096781 - 2¹⁴ = 1375080397 is a prime.

It is a super-2 number, since 2×1375096781² = 3781782314233123922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375096721) 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, 687548390 + 687548391.

It is an arithmetic number, because the mean of its divisors is an integer number (687548391).

Almost surely, 2^1375096781 is an apocalyptic number.

It is an amenable number.

1375096781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375096781 is an equidigital number, since it uses as much as digits as its factorization.

1375096781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 1375096781 is about 37082.2974072535. The cubic root of 1375096781 is about 1112.0161342504.

The spelling of 1375096781 in words is "one billion, three hundred seventy-five million, ninety-six thousand, seven hundred eighty-one".