180342989 has 4 divisors (see below), whose sum is σ = 184537056. Its totient is φ = 176148924.

The previous prime is 180342983. The next prime is 180342997. The reversal of 180342989 is 989243081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989243081 = 29527 ⋅33503.

It is a cyclic number.

It is not a de Polignac number, because 180342989 - 2⁴ = 180342973 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 (180342983) 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, 2096969 + ... + 2097054.

It is an arithmetic number, because the mean of its divisors is an integer number (46134264).

Almost surely, 2^180342989 is an apocalyptic number.

It is an amenable number.

180342989 is a deficient number, since it is larger than the sum of its proper divisors (4194067).

180342989 is an equidigital number, since it uses as much as digits as its factorization.

180342989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4194066.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 180342989 is about 13429.1842268993. The cubic root of 180342989 is about 564.9800175667.

The spelling of 180342989 in words is "one hundred eighty million, three hundred forty-two thousand, nine hundred eighty-nine".