118531867 has 2 divisors, whose sum is σ = 118531868. Its totient is φ = 118531866.

The previous prime is 118531843. The next prime is 118531913. The reversal of 118531867 is 768135811.

It is a weak prime.

It is an emirp because it is prime and its reverse (768135811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118531867 - 2⁷ = 118531739 is a prime.

It is not a weakly prime, because it can be changed into another prime (118511867) 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, 59265933 + 59265934.

It is an arithmetic number, because the mean of its divisors is an integer number (59265934).

Almost surely, 2^118531867 is an apocalyptic number.

118531867 is a deficient number, since it is larger than the sum of its proper divisors (1).

118531867 is an equidigital number, since it uses as much as digits as its factorization.

118531867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 118531867 is about 10887.2341299340. The cubic root of 118531867 is about 491.2226402113. Note that the first 3 decimals are identical.

It can be divided in two parts, 1185 and 31867, that multiplied together give a triangular number (37762395 = T₈₆₉₀).

The spelling of 118531867 in words is "one hundred eighteen million, five hundred thirty-one thousand, eight hundred sixty-seven".