1385876857 has 2 divisors, whose sum is σ = 1385876858. Its totient is φ = 1385876856.

The previous prime is 1385876831. The next prime is 1385876867. The reversal of 1385876857 is 7586785831.

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., 1259966016 + 125910841 = 35496^2 + 11221^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385876857 - 2⁷ = 1385876729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1385876867) 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, 692938428 + 692938429.

It is an arithmetic number, because the mean of its divisors is an integer number (692938429).

Almost surely, 2^1385876857 is an apocalyptic number.

It is an amenable number.

1385876857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385876857 is an equidigital number, since it uses as much as digits as its factorization.

1385876857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11289600, while the sum is 58.

The square root of 1385876857 is about 37227.3670436146. The cubic root of 1385876857 is about 1114.9144583708.

The spelling of 1385876857 in words is "one billion, three hundred eighty-five million, eight hundred seventy-six thousand, eight hundred fifty-seven".