1382731661 has 2 divisors, whose sum is σ = 1382731662. Its totient is φ = 1382731660.

The previous prime is 1382731643. The next prime is 1382731723. The reversal of 1382731661 is 1661372831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1147109161 + 235622500 = 33869^2 + 15350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1382731661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1382731561) 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, 691365830 + 691365831.

It is an arithmetic number, because the mean of its divisors is an integer number (691365831).

Almost surely, 2^1382731661 is an apocalyptic number.

It is an amenable number.

1382731661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382731661 is an equidigital number, since it uses as much as digits as its factorization.

1382731661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 1382731661 is about 37185.0999864193. The cubic root of 1382731661 is about 1114.0704005589.

The spelling of 1382731661 in words is "one billion, three hundred eighty-two million, seven hundred thirty-one thousand, six hundred sixty-one".