2113817 has 4 divisors (see below), whose sum is σ = 2123520. Its totient is φ = 2104116.

The previous prime is 2113801. The next prime is 2113819. The reversal of 2113817 is 7183112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2113817 - 2⁴ = 2113801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113792 and 2113801.

It is not an unprimeable number, because it can be changed into a prime (2113819) 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, 4517 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (530880).

2^2113817 is an apocalyptic number.

It is an amenable number.

2113817 is a deficient number, since it is larger than the sum of its proper divisors (9703).

2113817 is an equidigital number, since it uses as much as digits as its factorization.

2113817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9702.

The product of its digits is 336, while the sum is 23.

The square root of 2113817 is about 1453.8971765569. The cubic root of 2113817 is about 128.3381561502.

Adding to 2113817 its reverse (7183112), we get a palindrome (9296929).

The spelling of 2113817 in words is "two million, one hundred thirteen thousand, eight hundred seventeen".