180394321 has 2 divisors, whose sum is σ = 180394322. Its totient is φ = 180394320.

The previous prime is 180394273. The next prime is 180394369. The reversal of 180394321 is 123493081.

It is a balanced prime because it is at equal distance from previous prime (180394273) and next prime (180394369).

It can be written as a sum of positive squares in only one way, i.e., 173211921 + 7182400 = 13161^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 180394321 - 2¹¹ = 180392273 is a prime.

It is a super-2 number, since 2×180394321² = 65084222098102082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (180394381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90197160 + 90197161.

It is an arithmetic number, because the mean of its divisors is an integer number (90197161).

Almost surely, 2^180394321 is an apocalyptic number.

It is an amenable number.

180394321 is a deficient number, since it is larger than the sum of its proper divisors (1).

180394321 is an equidigital number, since it uses as much as digits as its factorization.

180394321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 180394321 is about 13431.0953015754. The cubic root of 180394321 is about 565.0336169206.

The spelling of 180394321 in words is "one hundred eighty million, three hundred ninety-four thousand, three hundred twenty-one".