181107137 has 4 divisors (see below), whose sum is σ = 191760516. Its totient is φ = 170453760.

The previous prime is 181107067. The next prime is 181107151. The reversal of 181107137 is 731701181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731701181 = 10459 ⋅69959.

It can be written as a sum of positive squares in 2 ways, for example, as 65351056 + 115756081 = 8084^2 + 10759^2 .

It is a cyclic number.

It is not a de Polignac number, because 181107137 - 2¹⁰ = 181106113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181107337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5326664 + ... + 5326697.

It is an arithmetic number, because the mean of its divisors is an integer number (47940129).

Almost surely, 2^181107137 is an apocalyptic number.

181107137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

181107137 is a deficient number, since it is larger than the sum of its proper divisors (10653379).

181107137 is a wasteful number, since it uses less digits than its factorization.

181107137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10653378.

The product of its (nonzero) digits is 1176, while the sum is 29.

The square root of 181107137 is about 13457.6051732840. The cubic root of 181107137 is about 565.7768695581.

The spelling of 181107137 in words is "one hundred eighty-one million, one hundred seven thousand, one hundred thirty-seven".