1386071957 has 2 divisors, whose sum is σ = 1386071958. Its totient is φ = 1386071956.

The previous prime is 1386071923. The next prime is 1386071959. The reversal of 1386071957 is 7591706831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1381906276 + 4165681 = 37174^2 + 2041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386071957 - 2⁶ = 1386071893 is a prime.

Together with 1386071959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386071959) 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, 693035978 + 693035979.

It is an arithmetic number, because the mean of its divisors is an integer number (693035979).

Almost surely, 2^1386071957 is an apocalyptic number.

It is an amenable number.

1386071957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386071957 is an equidigital number, since it uses as much as digits as its factorization.

1386071957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 1386071957 is about 37229.9873354800. The cubic root of 1386071957 is about 1114.9667741311.

The spelling of 1386071957 in words is "one billion, three hundred eighty-six million, seventy-one thousand, nine hundred fifty-seven".