118871391 has 16 divisors (see below), whose sum is σ = 172221440. Its totient is φ = 72653760.

The previous prime is 118871359. The next prime is 118871437. The reversal of 118871391 is 193178811.

It is not a de Polignac number, because 118871391 - 2⁵ = 118871359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118871791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31870 + ... + 35403.

It is an arithmetic number, because the mean of its divisors is an integer number (10763840).

Almost surely, 2^118871391 is an apocalyptic number.

118871391 is a deficient number, since it is larger than the sum of its proper divisors (53350049).

118871391 is a wasteful number, since it uses less digits than its factorization.

118871391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67326.

The product of its digits is 12096, while the sum is 39.

The square root of 118871391 is about 10902.8157372305. The cubic root of 118871391 is about 491.6912142999.

The spelling of 118871391 in words is "one hundred eighteen million, eight hundred seventy-one thousand, three hundred ninety-one".