118309129 has 9 divisors (see below), whose sum is σ = 120762453. Its totient is φ = 115905312.

The previous prime is 118309123. The next prime is 118309157. The reversal of 118309129 is 921903811.

The square root of 118309129 is 10877.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 15327225 + 102981904 = 3915^2 + 10148^2 .

It is not a de Polignac number, because 118309129 - 2¹¹ = 118307081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 118309094 and 118309103.

It is not an unprimeable number, because it can be changed into a prime (118309123) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 793947 + ... + 794095.

Almost surely, 2^118309129 is an apocalyptic number.

118309129 is the 10877-th square number.

118309129 is the 5439-th centered octagonal number.

It is an amenable number.

118309129 is a deficient number, since it is larger than the sum of its proper divisors (2453324).

118309129 is an frugal number, since it uses more digits than its factorization.

118309129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The cubic root of 118309129 is about 490.9147552023.

It can be divided in two parts, 11 and 8309129, that multiplied together give a palindrome (91400419).

The spelling of 118309129 in words is "one hundred eighteen million, three hundred nine thousand, one hundred twenty-nine".