181268969 has 8 divisors (see below), whose sum is σ = 210257088. Its totient is φ = 153054000.

The previous prime is 181268963. The next prime is 181268999. The reversal of 181268969 is 969862181.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 181268969 - 2⁴ = 181268953 is a prime.

It is a super-2 number, since 2×181268969² = 65716878244645922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181268963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192782 + ... + 193719.

It is an arithmetic number, because the mean of its divisors is an integer number (26282136).

Almost surely, 2^181268969 is an apocalyptic number.

It is an amenable number.

181268969 is a deficient number, since it is larger than the sum of its proper divisors (28988119).

181268969 is an equidigital number, since it uses as much as digits as its factorization.

181268969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386575.

The product of its digits is 373248, while the sum is 50.

The square root of 181268969 is about 13463.6164903788. The cubic root of 181268969 is about 565.9453399000.

The spelling of 181268969 in words is "one hundred eighty-one million, two hundred sixty-eight thousand, nine hundred sixty-nine".