180722879 has 4 divisors (see below), whose sum is σ = 180765120. Its totient is φ = 180680640.

The previous prime is 180722831. The next prime is 180722881. The reversal of 180722879 is 978227081.

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

It is a cyclic number.

It is not a de Polignac number, because 180722879 - 2²⁰ = 179674303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180722579) 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 3 ways as a sum of consecutive naturals, for example, 13874 + ... + 23535.

It is an arithmetic number, because the mean of its divisors is an integer number (45191280).

Almost surely, 2^180722879 is an apocalyptic number.

180722879 is a deficient number, since it is larger than the sum of its proper divisors (42241).

180722879 is an equidigital number, since it uses as much as digits as its factorization.

180722879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42240.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 180722879 is about 13443.3209810671. The cubic root of 180722879 is about 565.3764468577.

The spelling of 180722879 in words is "one hundred eighty million, seven hundred twenty-two thousand, eight hundred seventy-nine".