1380641917 has 2 divisors, whose sum is σ = 1380641918. Its totient is φ = 1380641916.

The previous prime is 1380641909. The next prime is 1380641929. The reversal of 1380641917 is 7191460831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1291036761 + 89605156 = 35931^2 + 9466^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380641917 - 2³ = 1380641909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1380641917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380641987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690320958 + 690320959.

It is an arithmetic number, because the mean of its divisors is an integer number (690320959).

Almost surely, 2^1380641917 is an apocalyptic number.

It is an amenable number.

1380641917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380641917 is an equidigital number, since it uses as much as digits as its factorization.

1380641917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1380641917 is about 37156.9901499032. The cubic root of 1380641917 is about 1113.5088802415.

The spelling of 1380641917 in words is "one billion, three hundred eighty million, six hundred forty-one thousand, nine hundred seventeen".