181414139 has 4 divisors (see below), whose sum is σ = 187266240. Its totient is φ = 175562040.

The previous prime is 181414127. The next prime is 181414141. The reversal of 181414139 is 931414181.

It is a happy number.

181414139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181414139 is a prime.

It is a super-2 number, since 2×181414139² = 65822179658222642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181414199) 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, 2926004 + ... + 2926065.

It is an arithmetic number, because the mean of its divisors is an integer number (46816560).

Almost surely, 2^181414139 is an apocalyptic number.

181414139 is a deficient number, since it is larger than the sum of its proper divisors (5852101).

181414139 is an equidigital number, since it uses as much as digits as its factorization.

181414139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852100.

The product of its digits is 3456, while the sum is 32.

The square root of 181414139 is about 13469.0066077644. The cubic root of 181414139 is about 566.0963794720.

The spelling of 181414139 in words is "one hundred eighty-one million, four hundred fourteen thousand, one hundred thirty-nine".