118358921 has 2 divisors, whose sum is σ = 118358922. Its totient is φ = 118358920.

The previous prime is 118358881. The next prime is 118358941. The reversal of 118358921 is 129853811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106832896 + 11526025 = 10336^2 + 3395^2 .

It is a cyclic number.

It is not a de Polignac number, because 118358921 - 2¹⁸ = 118096777 is a prime.

It is not a weakly prime, because it can be changed into another prime (118358941) 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, 59179460 + 59179461.

It is an arithmetic number, because the mean of its divisors is an integer number (59179461).

Almost surely, 2^118358921 is an apocalyptic number.

It is an amenable number.

118358921 is a deficient number, since it is larger than the sum of its proper divisors (1).

118358921 is an equidigital number, since it uses as much as digits as its factorization.

118358921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 38.

The square root of 118358921 is about 10879.2886256409. The cubic root of 118358921 is about 490.9836149186.

The spelling of 118358921 in words is "one hundred eighteen million, three hundred fifty-eight thousand, nine hundred twenty-one".