118173409 has 8 divisors (see below), whose sum is σ = 127177128. Its totient is φ = 109397760.

The previous prime is 118173403. The next prime is 118173427. The reversal of 118173409 is 904371811.

It can be written as a sum of positive squares in 4 ways, for example, as 25725184 + 92448225 = 5072^2 + 9615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 118173409 - 2¹³ = 118165217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118173403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55942 + ... + 58015.

It is an arithmetic number, because the mean of its divisors is an integer number (15897141).

Almost surely, 2^118173409 is an apocalyptic number.

It is an amenable number.

118173409 is a deficient number, since it is larger than the sum of its proper divisors (9003719).

118173409 is a wasteful number, since it uses less digits than its factorization.

118173409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114035.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 118173409 is about 10870.7593571010. The cubic root of 118173409 is about 490.7269634268.

The spelling of 118173409 in words is "one hundred eighteen million, one hundred seventy-three thousand, four hundred nine".