180742489 has 2 divisors, whose sum is σ = 180742490. Its totient is φ = 180742488.

The previous prime is 180742477. The next prime is 180742517. The reversal of 180742489 is 984247081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166926400 + 13816089 = 12920^2 + 3717^2 .

It is a cyclic number.

It is not a de Polignac number, because 180742489 - 2⁷ = 180742361 is a prime.

It is not a weakly prime, because it can be changed into another prime (180742439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90371244 + 90371245.

It is an arithmetic number, because the mean of its divisors is an integer number (90371245).

Almost surely, 2^180742489 is an apocalyptic number.

It is an amenable number.

180742489 is a deficient number, since it is larger than the sum of its proper divisors (1).

180742489 is an equidigital number, since it uses as much as digits as its factorization.

180742489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 180742489 is about 13444.0503197511. The cubic root of 180742489 is about 565.3968955343.

The spelling of 180742489 in words is "one hundred eighty million, seven hundred forty-two thousand, four hundred eighty-nine".