111431077 has 2 divisors, whose sum is σ = 111431078. Its totient is φ = 111431076.

The previous prime is 111431063. The next prime is 111431129. The reversal of 111431077 is 770134111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77686596 + 33744481 = 8814^2 + 5809^2 .

It is a cyclic number.

It is not a de Polignac number, because 111431077 - 2¹¹ = 111429029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111431377) 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, 55715538 + 55715539.

It is an arithmetic number, because the mean of its divisors is an integer number (55715539).

Almost surely, 2^111431077 is an apocalyptic number.

It is an amenable number.

111431077 is a deficient number, since it is larger than the sum of its proper divisors (1).

111431077 is an equidigital number, since it uses as much as digits as its factorization.

111431077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 111431077 is about 10556.0919378338. The cubic root of 111431077 is about 481.2108851776.

Adding to 111431077 its reverse (770134111), we get a palindrome (881565188).

The spelling of 111431077 in words is "one hundred eleven million, four hundred thirty-one thousand, seventy-seven".