118309843 has 2 divisors, whose sum is σ = 118309844. Its totient is φ = 118309842.

The previous prime is 118309787. The next prime is 118309897. The reversal of 118309843 is 348903811.

It is a strong prime.

It is an emirp because it is prime and its reverse (348903811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118309843 is a prime.

It is not a weakly prime, because it can be changed into another prime (118309043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59154921 + 59154922.

It is an arithmetic number, because the mean of its divisors is an integer number (59154922).

Almost surely, 2^118309843 is an apocalyptic number.

118309843 is a deficient number, since it is larger than the sum of its proper divisors (1).

118309843 is an equidigital number, since it uses as much as digits as its factorization.

118309843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 118309843 is about 10877.0328215005. The cubic root of 118309843 is about 490.9157427633.

The spelling of 118309843 in words is "one hundred eighteen million, three hundred nine thousand, eight hundred forty-three".