181142799 has 8 divisors (see below), whose sum is σ = 241646592. Its totient is φ = 120700440.

The previous prime is 181142791. The next prime is 181142851. The reversal of 181142799 is 997241181.

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

It is not a de Polignac number, because 181142799 - 2³ = 181142791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181142799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181142791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7969 + ... + 20634.

It is an arithmetic number, because the mean of its divisors is an integer number (30205824).

Almost surely, 2^181142799 is an apocalyptic number.

181142799 is a deficient number, since it is larger than the sum of its proper divisors (60503793).

181142799 is a wasteful number, since it uses less digits than its factorization.

181142799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30717.

The product of its digits is 36288, while the sum is 42.

The square root of 181142799 is about 13458.9300837771. The cubic root of 181142799 is about 565.8140030303.

The spelling of 181142799 in words is "one hundred eighty-one million, one hundred forty-two thousand, seven hundred ninety-nine".