1383722885 has 4 divisors (see below), whose sum is σ = 1660467468. Its totient is φ = 1106978304.

The previous prime is 1383722881. The next prime is 1383722891. The reversal of 1383722885 is 5882273831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5882273831 = 7 ⋅840324833.

It can be written as a sum of positive squares in 2 ways, for example, as 987593476 + 396129409 = 31426^2 + 19903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1383722885 - 2² = 1383722881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383722881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138372284 + ... + 138372293.

It is an arithmetic number, because the mean of its divisors is an integer number (415116867).

Almost surely, 2^1383722885 is an apocalyptic number.

It is an amenable number.

1383722885 is a deficient number, since it is larger than the sum of its proper divisors (276744583).

1383722885 is an equidigital number, since it uses as much as digits as its factorization.

1383722885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276744582.

The product of its digits is 645120, while the sum is 47.

The square root of 1383722885 is about 37198.4258403497. The cubic root of 1383722885 is about 1114.3365475346.

The spelling of 1383722885 in words is "one billion, three hundred eighty-three million, seven hundred twenty-two thousand, eight hundred eighty-five".