181740149 has 8 divisors (see below), whose sum is σ = 202559040. Its totient is φ = 162046656.

The previous prime is 181740079. The next prime is 181740157. The reversal of 181740149 is 941047181.

181740149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181740149 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 (181740179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281009 + ... + 281654.

It is an arithmetic number, because the mean of its divisors is an integer number (25319880).

Almost surely, 2^181740149 is an apocalyptic number.

181740149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

181740149 is a deficient number, since it is larger than the sum of its proper divisors (20818891).

181740149 is a wasteful number, since it uses less digits than its factorization.

181740149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562699.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 181740149 is about 13481.1034043954. The cubic root of 181740149 is about 566.4352774242.

The spelling of 181740149 in words is "one hundred eighty-one million, seven hundred forty thousand, one hundred forty-nine".