113440813 has 8 divisors (see below), whose sum is σ = 121178808. Its totient is φ = 105821184.

The previous prime is 113440799. The next prime is 113440823. The reversal of 113440813 is 318044311.

It can be written as a sum of positive squares in 4 ways, for example, as 36036009 + 77404804 = 6003^2 + 8798^2 .

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 113440813 - 2⁵ = 113440781 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 (113440823) 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, 27606 + ... + 31447.

It is an arithmetic number, because the mean of its divisors is an integer number (15147351).

Almost surely, 2^113440813 is an apocalyptic number.

It is an amenable number.

113440813 is a deficient number, since it is larger than the sum of its proper divisors (7737995).

113440813 is a wasteful number, since it uses less digits than its factorization.

113440813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59183.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 113440813 is about 10650.8597305570. The cubic root of 113440813 is about 484.0866546232.

The spelling of 113440813 in words is "one hundred thirteen million, four hundred forty thousand, eight hundred thirteen".