118303561 has 4 divisors (see below), whose sum is σ = 125262612. Its totient is φ = 111344512.

The previous prime is 118303553. The next prime is 118303589. The reversal of 118303561 is 165303811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78057225 + 40246336 = 8835^2 + 6344^2 .

It is a cyclic number.

It is not a de Polignac number, because 118303561 - 2³ = 118303553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118303511) 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 in 3 ways as a sum of consecutive naturals, for example, 3479500 + ... + 3479533.

It is an arithmetic number, because the mean of its divisors is an integer number (31315653).

Almost surely, 2^118303561 is an apocalyptic number.

It is an amenable number.

118303561 is a deficient number, since it is larger than the sum of its proper divisors (6959051).

118303561 is an equidigital number, since it uses as much as digits as its factorization.

118303561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6959050.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 118303561 is about 10876.7440440602. The cubic root of 118303561 is about 490.9070537503.

The spelling of 118303561 in words is "one hundred eighteen million, three hundred three thousand, five hundred sixty-one".