1328620313 has 2 divisors, whose sum is σ = 1328620314. Its totient is φ = 1328620312.

The previous prime is 1328620253. The next prime is 1328620339. The reversal of 1328620313 is 3130268231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1312395529 + 16224784 = 36227^2 + 4028^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328620313 - 2¹⁴ = 1328603929 is a prime.

It is a super-2 number, since 2×1328620313² = 3530463872232435938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1328620613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664310156 + 664310157.

It is an arithmetic number, because the mean of its divisors is an integer number (664310157).

Almost surely, 2^1328620313 is an apocalyptic number.

It is an amenable number.

1328620313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328620313 is an equidigital number, since it uses as much as digits as its factorization.

1328620313 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 29.

The square root of 1328620313 is about 36450.2443476035. The cubic root of 1328620313 is about 1099.3440477631.

Adding to 1328620313 its reverse (3130268231), we get a palindrome (4458888544).

The spelling of 1328620313 in words is "one billion, three hundred twenty-eight million, six hundred twenty thousand, three hundred thirteen".