1382764861 has 2 divisors, whose sum is σ = 1382764862. Its totient is φ = 1382764860.

The previous prime is 1382764847. The next prime is 1382764871. The reversal of 1382764861 is 1684672831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243972900 + 138791961 = 35270^2 + 11781^2 .

It is an emirp because it is prime and its reverse (1684672831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1382764861 - 2²¹ = 1380667709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1382764871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691382430 + 691382431.

It is an arithmetic number, because the mean of its divisors is an integer number (691382431).

Almost surely, 2^1382764861 is an apocalyptic number.

It is an amenable number.

1382764861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1382764861 is an equidigital number, since it uses as much as digits as its factorization.

1382764861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 46.

The square root of 1382764861 is about 37185.5463991051. The cubic root of 1382764861 is about 1114.0793169289.

The spelling of 1382764861 in words is "one billion, three hundred eighty-two million, seven hundred sixty-four thousand, eight hundred sixty-one".