2117963 has 4 divisors (see below), whose sum is σ = 2122800. Its totient is φ = 2113128.

The previous prime is 2117953. The next prime is 2117971. The reversal of 2117963 is 3697112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2117903) 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, 1688 + ... + 2661.

It is an arithmetic number, because the mean of its divisors is an integer number (530700).

2^2117963 is an apocalyptic number.

2117963 is a deficient number, since it is larger than the sum of its proper divisors (4837).

2117963 is an equidigital number, since it uses as much as digits as its factorization.

2117963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836.

The product of its digits is 2268, while the sum is 29.

The square root of 2117963 is about 1455.3223010729. The cubic root of 2117963 is about 128.4220080158.

The spelling of 2117963 in words is "two million, one hundred seventeen thousand, nine hundred sixty-three".