1380637 has 2 divisors, whose sum is σ = 1380638. Its totient is φ = 1380636.

The previous prime is 1380629. The next prime is 1380653. The reversal of 1380637 is 7360831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 586756 = 891^2 + 766^2 .

It is an emirp because it is prime and its reverse (7360831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380637 - 2³ = 1380629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690318 + 690319.

It is an arithmetic number, because the mean of its divisors is an integer number (690319).

2^1380637 is an apocalyptic number.

It is an amenable number.

1380637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380637 is an equidigital number, since it uses as much as digits as its factorization.

1380637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1380637 is about 1175.0051063719. The cubic root of 1380637 is about 111.3507558361.

The spelling of 1380637 in words is "one million, three hundred eighty thousand, six hundred thirty-seven".