1320631433 has 8 divisors (see below), whose sum is σ = 1441011936. Its totient is φ = 1200304800.

The previous prime is 1320631421. The next prime is 1320631469. The reversal of 1320631433 is 3341360231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320631433 - 2²⁴ = 1303854217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320631933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51410 + ... + 72692.

It is an arithmetic number, because the mean of its divisors is an integer number (180126492).

Almost surely, 2^1320631433 is an apocalyptic number.

It is an amenable number.

1320631433 is a deficient number, since it is larger than the sum of its proper divisors (120380503).

1320631433 is a wasteful number, since it uses less digits than its factorization.

1320631433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26935.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 1320631433 is about 36340.4930208714. The cubic root of 1320631433 is about 1097.1361961316.

Adding to 1320631433 its reverse (3341360231), we get a palindrome (4661991664).

The spelling of 1320631433 in words is "one billion, three hundred twenty million, six hundred thirty-one thousand, four hundred thirty-three".