111408137 has 6 divisors (see below), whose sum is σ = 112451598. Its totient is φ = 110374272.

The previous prime is 111408133. The next prime is 111408139. The reversal of 111408137 is 731804111.

It can be written as a sum of positive squares in 3 ways, for example, as 14661241 + 96746896 = 3829^2 + 9836^2 .

It is not a de Polignac number, because 111408137 - 2² = 111408133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111408133) 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 in 5 ways as a sum of consecutive naturals, for example, 7193 + ... + 16569.

It is an arithmetic number, because the mean of its divisors is an integer number (18741933).

Almost surely, 2^111408137 is an apocalyptic number.

It is an amenable number.

111408137 is a deficient number, since it is larger than the sum of its proper divisors (1043461).

111408137 is an frugal number, since it uses more digits than its factorization.

111408137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9595 (or 9486 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 111408137 is about 10555.0053055411. The cubic root of 111408137 is about 481.1778610709.

The spelling of 111408137 in words is "one hundred eleven million, four hundred eight thousand, one hundred thirty-seven".