1376728057 has 2 divisors, whose sum is σ = 1376728058. Its totient is φ = 1376728056.

The previous prime is 1376728027. The next prime is 1376728061. The reversal of 1376728057 is 7508276731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1355049721 + 21678336 = 36811^2 + 4656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376728057 - 2²³ = 1368339449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1376727998 and 1376728016.

It is not a weakly prime, because it can be changed into another prime (1376728027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688364028 + 688364029.

It is an arithmetic number, because the mean of its divisors is an integer number (688364029).

Almost surely, 2^1376728057 is an apocalyptic number.

It is an amenable number.

1376728057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376728057 is an equidigital number, since it uses as much as digits as its factorization.

1376728057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 1376728057 is about 37104.2862348813. The cubic root of 1376728057 is about 1112.4556883752.

The spelling of 1376728057 in words is "one billion, three hundred seventy-six million, seven hundred twenty-eight thousand, fifty-seven".