118778321 has 2 divisors, whose sum is σ = 118778322. Its totient is φ = 118778320.

The previous prime is 118778299. The next prime is 118778327. The reversal of 118778321 is 123877811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 1597696 = 10825^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 118778321 - 2¹⁰ = 118777297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (118778327) 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, 59389160 + 59389161.

It is an arithmetic number, because the mean of its divisors is an integer number (59389161).

Almost surely, 2^118778321 is an apocalyptic number.

It is an amenable number.

118778321 is a deficient number, since it is larger than the sum of its proper divisors (1).

118778321 is an equidigital number, since it uses as much as digits as its factorization.

118778321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 38.

The square root of 118778321 is about 10898.5467379830. The cubic root of 118778321 is about 491.5628580736.

The spelling of 118778321 in words is "one hundred eighteen million, seven hundred seventy-eight thousand, three hundred twenty-one".