1320627331 has 2 divisors, whose sum is σ = 1320627332. Its totient is φ = 1320627330.

The previous prime is 1320627313. The next prime is 1320627353. The reversal of 1320627331 is 1337260231.

Together with previous prime (1320627313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320627331 - 2⁵ = 1320627299 is a prime.

It is a super-3 number, since 3×1320627331³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1320627331.

It is not a weakly prime, because it can be changed into another prime (1320627361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660313665 + 660313666.

It is an arithmetic number, because the mean of its divisors is an integer number (660313666).

Almost surely, 2^1320627331 is an apocalyptic number.

1320627331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320627331 is an equidigital number, since it uses as much as digits as its factorization.

1320627331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 1320627331 is about 36340.4365824078. The cubic root of 1320627331 is about 1097.1350601958.

Adding to 1320627331 its reverse (1337260231), we get a palindrome (2657887562).

The spelling of 1320627331 in words is "one billion, three hundred twenty million, six hundred twenty-seven thousand, three hundred thirty-one".