1385998433 has 2 divisors, whose sum is σ = 1385998434. Its totient is φ = 1385998432.

The previous prime is 1385998417. The next prime is 1385998451. The reversal of 1385998433 is 3348995831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014549904 + 371448529 = 31852^2 + 19273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385998433 - 2⁴ = 1385998417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1385998333) 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 as a sum of consecutive naturals, namely, 692999216 + 692999217.

It is an arithmetic number, because the mean of its divisors is an integer number (692999217).

Almost surely, 2^1385998433 is an apocalyptic number.

It is an amenable number.

1385998433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385998433 is an equidigital number, since it uses as much as digits as its factorization.

1385998433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The square root of 1385998433 is about 37228.9998925569. Note that the first 3 decimals coincide. The cubic root of 1385998433 is about 1114.9470593618.

The spelling of 1385998433 in words is "one billion, three hundred eighty-five million, nine hundred ninety-eight thousand, four hundred thirty-three".