180475389 has 6 divisors (see below), whose sum is σ = 260686686. Its totient is φ = 120316920.

The previous prime is 180475369. The next prime is 180475409. The reversal of 180475389 is 983574081.

It is an interprime number because it is at equal distance from previous prime (180475369) and next prime (180475409).

It can be written as a sum of positive squares in only one way, i.e., 177342489 + 3132900 = 13317^2 + 1770^2 .

It is not a de Polignac number, because 180475389 - 2¹⁷ = 180344317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180475369) 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 5 ways as a sum of consecutive naturals, for example, 10026402 + ... + 10026419.

It is an arithmetic number, because the mean of its divisors is an integer number (43447781).

Almost surely, 2^180475389 is an apocalyptic number.

It is an amenable number.

180475389 is a deficient number, since it is larger than the sum of its proper divisors (80211297).

180475389 is a wasteful number, since it uses less digits than its factorization.

180475389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20052827 (or 20052824 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 180475389 is about 13434.1128847423. The cubic root of 180475389 is about 565.1182450195.

It can be divided in two parts, 18047 and 5389, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 180475389 in words is "one hundred eighty million, four hundred seventy-five thousand, three hundred eighty-nine".