2086621 has 2 divisors, whose sum is σ = 2086622. Its totient is φ = 2086620.

The previous prime is 2086589. The next prime is 2086639. The reversal of 2086621 is 1266802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 622521 = 1210^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2086621 - 2⁵ = 2086589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2086681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043310 + 1043311.

It is an arithmetic number, because the mean of its divisors is an integer number (1043311).

2^2086621 is an apocalyptic number.

It is an amenable number.

2086621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2086621 is an equidigital number, since it uses as much as digits as its factorization.

2086621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2086621 is about 1444.5141051579. The cubic root of 2086621 is about 127.7853866224.

The spelling of 2086621 in words is "two million, eighty-six thousand, six hundred twenty-one".