113640005 has 4 divisors (see below), whose sum is σ = 136368012. Its totient is φ = 90912000.

The previous prime is 113639983. The next prime is 113640029. The reversal of 113640005 is 500046311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500046311 = 643 ⋅777677.

It can be written as a sum of positive squares in 2 ways, for example, as 59013124 + 54626881 = 7682^2 + 7391^2 .

It is not a de Polignac number, because 113640005 - 2¹⁸ = 113377861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11363996 + ... + 11364005.

It is an arithmetic number, because the mean of its divisors is an integer number (34092003).

Almost surely, 2^113640005 is an apocalyptic number.

It is an amenable number.

113640005 is a deficient number, since it is larger than the sum of its proper divisors (22728007).

113640005 is an equidigital number, since it uses as much as digits as its factorization.

113640005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22728006.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 113640005 is about 10660.2066115062. The cubic root of 113640005 is about 484.3698266808.

Adding to 113640005 its reverse (500046311), we get a palindrome (613686316).

The spelling of 113640005 in words is "one hundred thirteen million, six hundred forty thousand, five".