1376729 has 2 divisors, whose sum is σ = 1376730. Its totient is φ = 1376728.

The previous prime is 1376723. The next prime is 1376737. The reversal of 1376729 is 9276731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 115600 = 1123^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376729 - 2¹² = 1372633 is a prime.

It is a Sophie Germain prime.

It is a d-powerful number, because it can be written as 1 + 3⁹ + 7 + 6 + 7⁷ + 2¹¹ + 9⁶ .

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1376723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688364 + 688365.

It is an arithmetic number, because the mean of its divisors is an integer number (688365).

2^1376729 is an apocalyptic number.

It is an amenable number.

1376729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376729 is an equidigital number, since it uses as much as digits as its factorization.

1376729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 35.

The square root of 1376729 is about 1173.3409564146. The cubic root of 1376729 is about 111.2455942370.

The spelling of 1376729 in words is "one million, three hundred seventy-six thousand, seven hundred twenty-nine".