118171387 has 2 divisors, whose sum is σ = 118171388. Its totient is φ = 118171386.

The previous prime is 118171381. The next prime is 118171481. The reversal of 118171387 is 783171811.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118171387 - 2¹⁵ = 118138619 is a prime.

It is not a weakly prime, because it can be changed into another prime (118171381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59085693 + 59085694.

It is an arithmetic number, because the mean of its divisors is an integer number (59085694).

Almost surely, 2^118171387 is an apocalyptic number.

118171387 is a deficient number, since it is larger than the sum of its proper divisors (1).

118171387 is an equidigital number, since it uses as much as digits as its factorization.

118171387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 37.

The square root of 118171387 is about 10870.6663549205. Note that the first 3 decimals coincide. The cubic root of 118171387 is about 490.7241645581.

The spelling of 118171387 in words is "one hundred eighteen million, one hundred seventy-one thousand, three hundred eighty-seven".