118121543 has 2 divisors, whose sum is σ = 118121544. Its totient is φ = 118121542.

The previous prime is 118121503. The next prime is 118121551. The reversal of 118121543 is 345121811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118121543 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118121503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59060771 + 59060772.

It is an arithmetic number, because the mean of its divisors is an integer number (59060772).

Almost surely, 2^118121543 is an apocalyptic number.

118121543 is a deficient number, since it is larger than the sum of its proper divisors (1).

118121543 is an equidigital number, since it uses as much as digits as its factorization.

118121543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 26.

The square root of 118121543 is about 10868.3735213692. The cubic root of 118121543 is about 490.6551599943.

The spelling of 118121543 in words is "one hundred eighteen million, one hundred twenty-one thousand, five hundred forty-three".