113640305 has 4 divisors (see below), whose sum is σ = 136368372. Its totient is φ = 90912240.

The previous prime is 113640301. The next prime is 113640323. The reversal of 113640305 is 503046311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503046311 = 47 ⋅10703113.

It can be written as a sum of positive squares in 2 ways, for example, as 26460736 + 87179569 = 5144^2 + 9337^2 .

It is not a de Polignac number, because 113640305 - 2² = 113640301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113640301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11364026 + ... + 11364035.

It is an arithmetic number, because the mean of its divisors is an integer number (34092093).

Almost surely, 2^113640305 is an apocalyptic number.

It is an amenable number.

113640305 is a deficient number, since it is larger than the sum of its proper divisors (22728067).

113640305 is an equidigital number, since it uses as much as digits as its factorization.

113640305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22728066.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 113640305 is about 10660.2206825187. The cubic root of 113640305 is about 484.3702529122.

Adding to 113640305 its reverse (503046311), we get a palindrome (616686616).

The spelling of 113640305 in words is "one hundred thirteen million, six hundred forty thousand, three hundred five".