1385663837 has 2 divisors, whose sum is σ = 1385663838. Its totient is φ = 1385663836.

The previous prime is 1385663831. The next prime is 1385663843. The reversal of 1385663837 is 7383665831.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1385663831) and next prime (1385663843).

It can be written as a sum of positive squares in only one way, i.e., 929884036 + 455779801 = 30494^2 + 21349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385663837 - 2⁴ = 1385663821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385663831) 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, 692831918 + 692831919.

It is an arithmetic number, because the mean of its divisors is an integer number (692831919).

Almost surely, 2^1385663837 is an apocalyptic number.

It is an amenable number.

1385663837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385663837 is an equidigital number, since it uses as much as digits as its factorization.

1385663837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The square root of 1385663837 is about 37224.5058664316. The cubic root of 1385663837 is about 1114.8573317831.

The spelling of 1385663837 in words is "one billion, three hundred eighty-five million, six hundred sixty-three thousand, eight hundred thirty-seven".