111293471 has 2 divisors, whose sum is σ = 111293472. Its totient is φ = 111293470.

The previous prime is 111293453. The next prime is 111293473. The reversal of 111293471 is 174392111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111293471 is a prime.

It is a super-3 number, since 3×111293471³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 111293473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111293473) 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, 55646735 + 55646736.

It is an arithmetic number, because the mean of its divisors is an integer number (55646736).

Almost surely, 2^111293471 is an apocalyptic number.

111293471 is a deficient number, since it is larger than the sum of its proper divisors (1).

111293471 is an equidigital number, since it uses as much as digits as its factorization.

111293471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 111293471 is about 10549.5720766295. The cubic root of 111293471 is about 481.0127214850.

The spelling of 111293471 in words is "one hundred eleven million, two hundred ninety-three thousand, four hundred seventy-one".