111928013 has 2 divisors, whose sum is σ = 111928014. Its totient is φ = 111928012.

The previous prime is 111928001. The next prime is 111928039. The reversal of 111928013 is 310829111.

It is an a-pointer prime, because the next prime (111928039) can be obtained adding 111928013 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., 63792169 + 48135844 = 7987^2 + 6938^2 .

It is an emirp because it is prime and its reverse (310829111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111928013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111928093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55964006 + 55964007.

It is an arithmetic number, because the mean of its divisors is an integer number (55964007).

Almost surely, 2^111928013 is an apocalyptic number.

It is an amenable number.

111928013 is a deficient number, since it is larger than the sum of its proper divisors (1).

111928013 is an equidigital number, since it uses as much as digits as its factorization.

111928013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 111928013 is about 10579.6036315166. The cubic root of 111928013 is about 481.9251575398.

The spelling of 111928013 in words is "one hundred eleven million, nine hundred twenty-eight thousand, thirteen".