118942921 has 2 divisors, whose sum is σ = 118942922. Its totient is φ = 118942920.

The previous prime is 118942909. The next prime is 118942937. The reversal of 118942921 is 129249811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109725625 + 9217296 = 10475^2 + 3036^2 .

It is a cyclic number.

It is not a de Polignac number, because 118942921 - 2⁹ = 118942409 is a prime.

It is not a weakly prime, because it can be changed into another prime (118942951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59471460 + 59471461.

It is an arithmetic number, because the mean of its divisors is an integer number (59471461).

Almost surely, 2^118942921 is an apocalyptic number.

It is an amenable number.

118942921 is a deficient number, since it is larger than the sum of its proper divisors (1).

118942921 is an equidigital number, since it uses as much as digits as its factorization.

118942921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 118942921 is about 10906.0955891648. The cubic root of 118942921 is about 491.7898184021.

The spelling of 118942921 in words is "one hundred eighteen million, nine hundred forty-two thousand, nine hundred twenty-one".