111317813 has 2 divisors, whose sum is σ = 111317814. Its totient is φ = 111317812.

The previous prime is 111317797. The next prime is 111317839. The reversal of 111317813 is 318713111.

It is an a-pointer prime, because the next prime (111317839) can be obtained adding 111317813 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111028369 + 289444 = 10537^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 111317813 - 2⁴ = 111317797 is a prime.

It is a super-2 number, since 2×111317813² = 24783310982205938, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111317413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55658906 + 55658907.

It is an arithmetic number, because the mean of its divisors is an integer number (55658907).

Almost surely, 2^111317813 is an apocalyptic number.

It is an amenable number.

111317813 is a deficient number, since it is larger than the sum of its proper divisors (1).

111317813 is an equidigital number, since it uses as much as digits as its factorization.

111317813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 26.

The square root of 111317813 is about 10550.7257096372. The cubic root of 111317813 is about 481.0477878071.

The spelling of 111317813 in words is "one hundred eleven million, three hundred seventeen thousand, eight hundred thirteen".