2117653 has 2 divisors, whose sum is σ = 2117654. Its totient is φ = 2117652.

The previous prime is 2117651. The next prime is 2117663. The reversal of 2117653 is 3567112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2010724 + 106929 = 1418^2 + 327^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117653 - 2¹ = 2117651 is a prime.

Together with 2117651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058826 + 1058827.

It is an arithmetic number, because the mean of its divisors is an integer number (1058827).

2^2117653 is an apocalyptic number.

It is an amenable number.

2117653 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117653 is an equidigital number, since it uses as much as digits as its factorization.

2117653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 2117653 is about 1455.2157915581. The cubic root of 2117653 is about 128.4157421265.

The spelling of 2117653 in words is "two million, one hundred seventeen thousand, six hundred fifty-three".