1382932781 has 2 divisors, whose sum is σ = 1382932782. Its totient is φ = 1382932780.

The previous prime is 1382932709. The next prime is 1382932843. The reversal of 1382932781 is 1872392831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 928177156 + 454755625 = 30466^2 + 21325^2 .

It is an emirp because it is prime and its reverse (1872392831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1382932781 - 2¹⁰ = 1382931757 is a prime.

It is a super-2 number, since 2×1382932781² = 3825006153528787922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1382932381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691466390 + 691466391.

It is an arithmetic number, because the mean of its divisors is an integer number (691466391).

Almost surely, 2^1382932781 is an apocalyptic number.

It is an amenable number.

1382932781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382932781 is an equidigital number, since it uses as much as digits as its factorization.

1382932781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 1382932781 is about 37187.8041970751. The cubic root of 1382932781 is about 1114.1244122380.

The spelling of 1382932781 in words is "one billion, three hundred eighty-two million, nine hundred thirty-two thousand, seven hundred eighty-one".