1118977813 has 2 divisors, whose sum is σ = 1118977814. Its totient is φ = 1118977812.

The previous prime is 1118977801. The next prime is 1118977819. The reversal of 1118977813 is 3187798111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1118099844 + 877969 = 33438^2 + 937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118977813 is a prime.

It is a super-2 number, since 2×1118977813² = 2504222691972525938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118977819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559488906 + 559488907.

It is an arithmetic number, because the mean of its divisors is an integer number (559488907).

Almost surely, 2^1118977813 is an apocalyptic number.

It is an amenable number.

1118977813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118977813 is an equidigital number, since it uses as much as digits as its factorization.

1118977813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 46.

The square root of 1118977813 is about 33451.1257359151. The cubic root of 1118977813 is about 1038.1827896852.

The spelling of 1118977813 in words is "one billion, one hundred eighteen million, nine hundred seventy-seven thousand, eight hundred thirteen".