1385285773 has 4 divisors (see below), whose sum is σ = 1385373888. Its totient is φ = 1385197660.

The previous prime is 1385285761. The next prime is 1385285779. The reversal of 1385285773 is 3775825831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3775825831 = 1789 ⋅2110579.

It is a cyclic number.

It is not a de Polignac number, because 1385285773 - 2²¹ = 1383188621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385285779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13333 + ... + 54298.

It is an arithmetic number, because the mean of its divisors is an integer number (346343472).

Almost surely, 2^1385285773 is an apocalyptic number.

It is an amenable number.

1385285773 is a deficient number, since it is larger than the sum of its proper divisors (88115).

1385285773 is an equidigital number, since it uses as much as digits as its factorization.

1385285773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88114.

The product of its digits is 1411200, while the sum is 49.

The square root of 1385285773 is about 37219.4273599151. The cubic root of 1385285773 is about 1114.7559301421.

The spelling of 1385285773 in words is "one billion, three hundred eighty-five million, two hundred eighty-five thousand, seven hundred seventy-three".