1381769 has 2 divisors, whose sum is σ = 1381770. Its totient is φ = 1381768.

The previous prime is 1381759. The next prime is 1381819. The reversal of 1381769 is 9671831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 198025 = 1088^2 + 445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381769 is a prime.

It is a super-2 number, since 2×1381769² = 3818571138722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1381739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690884 + 690885.

It is an arithmetic number, because the mean of its divisors is an integer number (690885).

2^1381769 is an apocalyptic number.

It is an amenable number.

1381769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381769 is an equidigital number, since it uses as much as digits as its factorization.

1381769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1381769 is about 1175.4867077088. The cubic root of 1381769 is about 111.3811801069.

The spelling of 1381769 in words is "one million, three hundred eighty-one thousand, seven hundred sixty-nine".