2166613 has 2 divisors, whose sum is σ = 2166614. Its totient is φ = 2166612.

The previous prime is 2166607. The next prime is 2166629. The reversal of 2166613 is 3166612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2140369 + 26244 = 1463^2 + 162^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166613 - 2⁵ = 2166581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083306 + 1083307.

It is an arithmetic number, because the mean of its divisors is an integer number (1083307).

2^2166613 is an apocalyptic number.

It is an amenable number.

2166613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166613 is an equidigital number, since it uses as much as digits as its factorization.

2166613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 2166613 is about 1471.9419146148. The cubic root of 2166613 is about 129.3978662314.

Subtracting 2166613 from its reverse (3166612), we obtain a palindrome (999999).

The spelling of 2166613 in words is "two million, one hundred sixty-six thousand, six hundred thirteen".