1320618747 has 24 divisors (see below), whose sum is σ = 2074252800. Its totient is φ = 745080336.

The previous prime is 1320618743. The next prime is 1320618749. The reversal of 1320618747 is 7478160231.

It is not a de Polignac number, because 1320618747 - 2² = 1320618743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320618743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45247 + ... + 68472.

It is an arithmetic number, because the mean of its divisors is an integer number (86427200).

Almost surely, 2^1320618747 is an apocalyptic number.

1320618747 is a deficient number, since it is larger than the sum of its proper divisors (753634053).

1320618747 is a wasteful number, since it uses less digits than its factorization.

1320618747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113815 (or 113808 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 1320618747 is about 36340.3184768653. The cubic root of 1320618747 is about 1097.1326830862.

Adding to 1320618747 its reverse (7478160231), we get a palindrome (8798778978).

The spelling of 1320618747 in words is "one billion, three hundred twenty million, six hundred eighteen thousand, seven hundred forty-seven".