113640253 has 4 divisors (see below), whose sum is σ = 114811900. Its totient is φ = 112468608.

The previous prime is 113640227. The next prime is 113640281. The reversal of 113640253 is 352046311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352046311 = 61 ⋅5771251.

It can be written as a sum of positive squares in 2 ways, for example, as 68508729 + 45131524 = 8277^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 113640253 - 2²¹ = 111543101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113647253) 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, 585678 + ... + 585871.

It is an arithmetic number, because the mean of its divisors is an integer number (28702975).

Almost surely, 2^113640253 is an apocalyptic number.

It is an amenable number.

113640253 is a deficient number, since it is larger than the sum of its proper divisors (1171647).

113640253 is an equidigital number, since it uses as much as digits as its factorization.

113640253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171646.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 113640253 is about 10660.2182435445. The cubic root of 113640253 is about 484.3701790321.

Adding to 113640253 its reverse (352046311), we get a palindrome (465686564).

The spelling of 113640253 in words is "one hundred thirteen million, six hundred forty thousand, two hundred fifty-three".