1376789 has 2 divisors, whose sum is σ = 1376790. Its totient is φ = 1376788.

The previous prime is 1376777. The next prime is 1376819. The reversal of 1376789 is 9876731.

1376789 is nontrivially palindromic in base 8.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1322500 + 54289 = 1150^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376789 - 2⁴ = 1376773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688394 + 688395.

It is an arithmetic number, because the mean of its divisors is an integer number (688395).

2^1376789 is an apocalyptic number.

It is an amenable number.

1376789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376789 is an equidigital number, since it uses as much as digits as its factorization.

1376789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 41.

The square root of 1376789 is about 1173.3665241518. The cubic root of 1376789 is about 111.2472102991.

The spelling of 1376789 in words is "one million, three hundred seventy-six thousand, seven hundred eighty-nine".