111620471 has 2 divisors, whose sum is σ = 111620472. Its totient is φ = 111620470.

The previous prime is 111620437. The next prime is 111620473. The reversal of 111620471 is 174026111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111620471 - 2¹⁸ = 111358327 is a prime.

It is a super-3 number, since 3×111620471³ (a number of 25 digits) contains 333 as substring.

Together with 111620473, 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 (111620473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55810235 + 55810236.

It is an arithmetic number, because the mean of its divisors is an integer number (55810236).

Almost surely, 2^111620471 is an apocalyptic number.

111620471 is a deficient number, since it is larger than the sum of its proper divisors (1).

111620471 is an equidigital number, since it uses as much as digits as its factorization.

111620471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 111620471 is about 10565.0589681270. The cubic root of 111620471 is about 481.4833611361.

Adding to 111620471 its reverse (174026111), we get a palindrome (285646582).

The spelling of 111620471 in words is "one hundred eleven million, six hundred twenty thousand, four hundred seventy-one".