1331404433 has 2 divisors, whose sum is σ = 1331404434. Its totient is φ = 1331404432.

The previous prime is 1331404429. The next prime is 1331404457. The reversal of 1331404433 is 3344041331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215777424 + 115627009 = 34868^2 + 10753^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331404433 - 2² = 1331404429 is a prime.

It is a super-3 number, since 3×1331404433³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1331404463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665702216 + 665702217.

It is an arithmetic number, because the mean of its divisors is an integer number (665702217).

Almost surely, 2^1331404433 is an apocalyptic number.

It is an amenable number.

1331404433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331404433 is an equidigital number, since it uses as much as digits as its factorization.

1331404433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 1331404433 is about 36488.4150519038. The cubic root of 1331404433 is about 1100.1114027669. Note that the first 3 decimals are identical.

Adding to 1331404433 its reverse (3344041331), we get a palindrome (4675445764).

The spelling of 1331404433 in words is "one billion, three hundred thirty-one million, four hundred four thousand, four hundred thirty-three".