1380686653 has 2 divisors, whose sum is σ = 1380686654. Its totient is φ = 1380686652.

The previous prime is 1380686639. The next prime is 1380686687. The reversal of 1380686653 is 3566860831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1316093284 + 64593369 = 36278^2 + 8037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1380686653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380686693) 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, 690343326 + 690343327.

It is an arithmetic number, because the mean of its divisors is an integer number (690343327).

Almost surely, 2^1380686653 is an apocalyptic number.

It is an amenable number.

1380686653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380686653 is an equidigital number, since it uses as much as digits as its factorization.

1380686653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 1380686653 is about 37157.5921313532. The cubic root of 1380686653 is about 1113.5209068683.

The spelling of 1380686653 in words is "one billion, three hundred eighty million, six hundred eighty-six thousand, six hundred fifty-three".