111878113 has 2 divisors, whose sum is σ = 111878114. Its totient is φ = 111878112.

The previous prime is 111878093. The next prime is 111878149. The reversal of 111878113 is 311878111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111872929 + 5184 = 10577^2 + 72^2 .

It is an emirp because it is prime and its reverse (311878111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111878113 - 2¹³ = 111869921 is a prime.

It is not a weakly prime, because it can be changed into another prime (111878153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55939056 + 55939057.

It is an arithmetic number, because the mean of its divisors is an integer number (55939057).

Almost surely, 2^111878113 is an apocalyptic number.

It is an amenable number.

111878113 is a deficient number, since it is larger than the sum of its proper divisors (1).

111878113 is an equidigital number, since it uses as much as digits as its factorization.

111878113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 31.

The square root of 111878113 is about 10577.2450571971. The cubic root of 111878113 is about 481.8535292395.

The spelling of 111878113 in words is "one hundred eleven million, eight hundred seventy-eight thousand, one hundred thirteen".