1386318161 has 2 divisors, whose sum is σ = 1386318162. Its totient is φ = 1386318160.

The previous prime is 1386318127. The next prime is 1386318187. The reversal of 1386318161 is 1618136831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1276990225 + 109327936 = 35735^2 + 10456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1386318161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1386318121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693159080 + 693159081.

It is an arithmetic number, because the mean of its divisors is an integer number (693159081).

Almost surely, 2^1386318161 is an apocalyptic number.

It is an amenable number.

1386318161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386318161 is an equidigital number, since it uses as much as digits as its factorization.

1386318161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 1386318161 is about 37233.2937167799. The cubic root of 1386318161 is about 1115.0327863431.

The spelling of 1386318161 in words is "one billion, three hundred eighty-six million, three hundred eighteen thousand, one hundred sixty-one".