1379681 has 2 divisors, whose sum is σ = 1379682. Its totient is φ = 1379680.

The previous prime is 1379663. The next prime is 1379699. The reversal of 1379681 is 1869731.

It is a balanced prime because it is at equal distance from previous prime (1379663) and next prime (1379699).

It can be written as a sum of positive squares in only one way, i.e., 707281 + 672400 = 841^2 + 820^2 .

It is an emirp because it is prime and its reverse (1869731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1379681 is a prime.

It is a super-2 number, since 2×1379681² = 3807039323522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1379621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689840 + 689841.

It is an arithmetic number, because the mean of its divisors is an integer number (689841).

2^1379681 is an apocalyptic number.

It is an amenable number.

1379681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379681 is an equidigital number, since it uses as much as digits as its factorization.

1379681 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 1379681 is about 1174.5982291831. The cubic root of 1379681 is about 111.3250488854.

The spelling of 1379681 in words is "one million, three hundred seventy-nine thousand, six hundred eighty-one".