181380706 has 8 divisors (see below), whose sum is σ = 292999644. Its totient is φ = 83714160.

The previous prime is 181380673. The next prime is 181380709. The reversal of 181380706 is 607083181.

It can be written as a sum of positive squares in 2 ways, for example, as 179962225 + 1418481 = 13415^2 + 1191^2 .

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

It is not an unprimeable number, because it can be changed into a prime (181380709) 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, 3488065 + ... + 3488116.

Almost surely, 2^181380706 is an apocalyptic number.

181380706 is a deficient number, since it is larger than the sum of its proper divisors (111618938).

181380706 is a wasteful number, since it uses less digits than its factorization.

181380706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6976196.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 181380706 is about 13467.7654419729. The cubic root of 181380706 is about 566.0616018390.

The spelling of 181380706 in words is "one hundred eighty-one million, three hundred eighty thousand, seven hundred six".