1318828813 has 4 divisors (see below), whose sum is σ = 1322422720. Its totient is φ = 1315234908.

The previous prime is 1318828801. The next prime is 1318828831. The reversal of 1318828813 is 3188288131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1318828813 - 2¹⁷ = 1318697741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1318828813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318828843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1796403 + ... + 1797136.

It is an arithmetic number, because the mean of its divisors is an integer number (330605680).

Almost surely, 2^1318828813 is an apocalyptic number.

It is an amenable number.

1318828813 is a deficient number, since it is larger than the sum of its proper divisors (3593907).

1318828813 is an equidigital number, since it uses as much as digits as its factorization.

1318828813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3593906.

The product of its digits is 73728, while the sum is 43.

The square root of 1318828813 is about 36315.6827417577. The cubic root of 1318828813 is about 1096.6367834706.

The spelling of 1318828813 in words is "one billion, three hundred eighteen million, eight hundred twenty-eight thousand, eight hundred thirteen".