2117623 has 2 divisors, whose sum is σ = 2117624. Its totient is φ = 2117622.

The previous prime is 2117611. The next prime is 2117651. The reversal of 2117623 is 3267112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2117594 and 2117603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117653) 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 as a sum of consecutive naturals, namely, 1058811 + 1058812.

It is an arithmetic number, because the mean of its divisors is an integer number (1058812).

2^2117623 is an apocalyptic number.

2117623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117623 is an equidigital number, since it uses as much as digits as its factorization.

2117623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 22.

The square root of 2117623 is about 1455.2054837720. The cubic root of 2117623 is about 128.4151357176.

The spelling of 2117623 in words is "two million, one hundred seventeen thousand, six hundred twenty-three".