181069090 has 8 divisors (see below), whose sum is σ = 325924380. Its totient is φ = 72427632.

The previous prime is 181069081. The next prime is 181069129. The reversal of 181069090 is 90960181.

It can be written as a sum of positive squares in 2 ways, for example, as 180391761 + 677329 = 13431^2 + 823^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9053445 + ... + 9053464.

Almost surely, 2^181069090 is an apocalyptic number.

181069090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181069090 is a deficient number, since it is larger than the sum of its proper divisors (144855290).

181069090 is a wasteful number, since it uses less digits than its factorization.

181069090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18106916.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 181069090 is about 13456.1915117168. The cubic root of 181069090 is about 565.7372473019.

The spelling of 181069090 in words is "one hundred eighty-one million, sixty-nine thousand, ninety".