181342429 has 4 divisors (see below), whose sum is σ = 181426300. Its totient is φ = 181258560.

The previous prime is 181342409. The next prime is 181342433. The reversal of 181342429 is 924243181.

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

It can be written as a sum of positive squares in 2 ways, for example, as 139287204 + 42055225 = 11802^2 + 6485^2 .

It is a cyclic number.

It is not a de Polignac number, because 181342429 - 2⁹ = 181341917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181342394 and 181342403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181342409) 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, 38604 + ... + 43045.

It is an arithmetic number, because the mean of its divisors is an integer number (45356575).

Almost surely, 2^181342429 is an apocalyptic number.

It is an amenable number.

181342429 is a deficient number, since it is larger than the sum of its proper divisors (83871).

181342429 is an equidigital number, since it uses as much as digits as its factorization.

181342429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83870.

The product of its digits is 13824, while the sum is 34.

The square root of 181342429 is about 13466.3443071979. The cubic root of 181342429 is about 566.0217801389.

The spelling of 181342429 in words is "one hundred eighty-one million, three hundred forty-two thousand, four hundred twenty-nine".