118820321 has 2 divisors, whose sum is σ = 118820322. Its totient is φ = 118820320.

The previous prime is 118820297. The next prime is 118820363. The reversal of 118820321 is 123028811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 250000 = 10889^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 118820321 - 2¹⁰ = 118819297 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (118820381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59410160 + 59410161.

It is an arithmetic number, because the mean of its divisors is an integer number (59410161).

Almost surely, 2^118820321 is an apocalyptic number.

It is an amenable number.

118820321 is a deficient number, since it is larger than the sum of its proper divisors (1).

118820321 is an equidigital number, since it uses as much as digits as its factorization.

118820321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 118820321 is about 10900.4734300855. The cubic root of 118820321 is about 491.6207901017.

The spelling of 118820321 in words is "one hundred eighteen million, eight hundred twenty thousand, three hundred twenty-one".