1331384733 has 36 divisors (see below), whose sum is σ = 2368695420. Its totient is φ = 716034816.

The previous prime is 1331384707. The next prime is 1331384741. The reversal of 1331384733 is 3374831331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 571114404 + 760270329 = 23898^2 + 27573^2 .

It is not a de Polignac number, because 1331384733 - 2⁸ = 1331384477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331384753) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 81298 + ... + 96291.

It is an arithmetic number, because the mean of its divisors is an integer number (65797095).

Almost surely, 2^1331384733 is an apocalyptic number.

It is an amenable number.

1331384733 is a deficient number, since it is larger than the sum of its proper divisors (1037310687).

1331384733 is a wasteful number, since it uses less digits than its factorization.

1331384733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177626 (or 177616 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 1331384733 is about 36488.1451022109. The cubic root of 1331384733 is about 1100.1059768419.

The spelling of 1331384733 in words is "one billion, three hundred thirty-one million, three hundred eighty-four thousand, seven hundred thirty-three".