181413869 has 16 divisors (see below), whose sum is σ = 224138880. Its totient is φ = 142983360.

The previous prime is 181413809. The next prime is 181413913. The reversal of 181413869 is 968314181.

It is not a de Polignac number, because 181413869 - 2²⁰ = 180365293 is a prime.

It is a super-2 number, since 2×181413869² = 65821983731098322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181413809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20774 + ... + 28184.

It is an arithmetic number, because the mean of its divisors is an integer number (14008680).

Almost surely, 2^181413869 is an apocalyptic number.

It is an amenable number.

181413869 is a deficient number, since it is larger than the sum of its proper divisors (42725011).

181413869 is a wasteful number, since it uses less digits than its factorization.

181413869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700.

The product of its digits is 41472, while the sum is 41.

The square root of 181413869 is about 13468.9965847497. The cubic root of 181413869 is about 566.0960986300.

The spelling of 181413869 in words is "one hundred eighty-one million, four hundred thirteen thousand, eight hundred sixty-nine".