111688477 has 2 divisors, whose sum is σ = 111688478. Its totient is φ = 111688476.

The previous prime is 111688471. The next prime is 111688523. The reversal of 111688477 is 774886111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70459236 + 41229241 = 8394^2 + 6421^2 .

It is a cyclic number.

It is not a de Polignac number, because 111688477 - 2⁷ = 111688349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111688471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55844238 + 55844239.

It is an arithmetic number, because the mean of its divisors is an integer number (55844239).

Almost surely, 2^111688477 is an apocalyptic number.

It is an amenable number.

111688477 is a deficient number, since it is larger than the sum of its proper divisors (1).

111688477 is an equidigital number, since it uses as much as digits as its factorization.

111688477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75264, while the sum is 43.

The square root of 111688477 is about 10568.2769172652. The cubic root of 111688477 is about 481.5811242961.

It can be divided in two parts, 1116884 and 77, that multiplied together give a palindrome (86000068).

The spelling of 111688477 in words is "one hundred eleven million, six hundred eighty-eight thousand, four hundred seventy-seven".