111887873 has 2 divisors, whose sum is σ = 111887874. Its totient is φ = 111887872.

The previous prime is 111887861. The next prime is 111887921. The reversal of 111887873 is 378788111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111344704 + 543169 = 10552^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 111887873 - 2⁴ = 111887857 is a prime.

It is a super-2 number, since 2×111887873² = 25037792248928258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111887803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55943936 + 55943937.

It is an arithmetic number, because the mean of its divisors is an integer number (55943937).

Almost surely, 2^111887873 is an apocalyptic number.

It is an amenable number.

111887873 is a deficient number, since it is larger than the sum of its proper divisors (1).

111887873 is an equidigital number, since it uses as much as digits as its factorization.

111887873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 44.

The square root of 111887873 is about 10577.7064149087. The cubic root of 111887873 is about 481.8675407787.

The spelling of 111887873 in words is "one hundred eleven million, eight hundred eighty-seven thousand, eight hundred seventy-three".