1320345431 has 2 divisors, whose sum is σ = 1320345432. Its totient is φ = 1320345430.

The previous prime is 1320345421. The next prime is 1320345451. The reversal of 1320345431 is 1345430231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320345431 - 2¹⁰ = 1320344407 is a prime.

It is a super-2 number, since 2×1320345431² = 3486624114325151522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320345431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320345421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660172715 + 660172716.

It is an arithmetic number, because the mean of its divisors is an integer number (660172716).

Almost surely, 2^1320345431 is an apocalyptic number.

1320345431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320345431 is an equidigital number, since it uses as much as digits as its factorization.

1320345431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1320345431 is about 36336.5577758819. The cubic root of 1320345431 is about 1097.0569901314.

Adding to 1320345431 its reverse (1345430231), we get a palindrome (2665775662).

The spelling of 1320345431 in words is "one billion, three hundred twenty million, three hundred forty-five thousand, four hundred thirty-one".