111047891 has 2 divisors, whose sum is σ = 111047892. Its totient is φ = 111047890.

The previous prime is 111047869. The next prime is 111047897. The reversal of 111047891 is 198740111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111047891 is a prime.

It is not a weakly prime, because it can be changed into another prime (111047897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55523945 + 55523946.

It is an arithmetic number, because the mean of its divisors is an integer number (55523946).

Almost surely, 2^111047891 is an apocalyptic number.

111047891 is a deficient number, since it is larger than the sum of its proper divisors (1).

111047891 is an equidigital number, since it uses as much as digits as its factorization.

111047891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 32.

The square root of 111047891 is about 10537.9263140335. The cubic root of 111047891 is about 480.6586602925.

The spelling of 111047891 in words is "one hundred eleven million, forty-seven thousand, eight hundred ninety-one".