118921393 has 2 divisors, whose sum is σ = 118921394. Its totient is φ = 118921392.

The previous prime is 118921333. The next prime is 118921427. The reversal of 118921393 is 393129811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117353889 + 1567504 = 10833^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 118921393 - 2⁹ = 118920881 is a prime.

It is not a weakly prime, because it can be changed into another prime (118921333) 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, 59460696 + 59460697.

It is an arithmetic number, because the mean of its divisors is an integer number (59460697).

Almost surely, 2^118921393 is an apocalyptic number.

It is an amenable number.

118921393 is a deficient number, since it is larger than the sum of its proper divisors (1).

118921393 is an equidigital number, since it uses as much as digits as its factorization.

118921393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 118921393 is about 10905.1085735081. The cubic root of 118921393 is about 491.7601462144.

The spelling of 118921393 in words is "one hundred eighteen million, nine hundred twenty-one thousand, three hundred ninety-three".