1381182917 has 2 divisors, whose sum is σ = 1381182918. Its totient is φ = 1381182916.

The previous prime is 1381182893. The next prime is 1381182947. The reversal of 1381182917 is 7192811831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1099983556 + 281199361 = 33166^2 + 16769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381182917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381182947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690591458 + 690591459.

It is an arithmetic number, because the mean of its divisors is an integer number (690591459).

Almost surely, 2^1381182917 is an apocalyptic number.

It is an amenable number.

1381182917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381182917 is an equidigital number, since it uses as much as digits as its factorization.

1381182917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 41.

The square root of 1381182917 is about 37164.2693591573. The cubic root of 1381182917 is about 1113.6543028477.

The spelling of 1381182917 in words is "one billion, three hundred eighty-one million, one hundred eighty-two thousand, nine hundred seventeen".