2088721 has 2 divisors, whose sum is σ = 2088722. Its totient is φ = 2088720.

The previous prime is 2088719. The next prime is 2088731. The reversal of 2088721 is 1278802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 239121 = 1360^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 2088721 - 2¹ = 2088719 is a prime.

Together with 2088719, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2088721.

It is not a weakly prime, because it can be changed into another prime (2088731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1044360 + 1044361.

It is an arithmetic number, because the mean of its divisors is an integer number (1044361).

2^2088721 is an apocalyptic number.

It is an amenable number.

2088721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2088721 is an equidigital number, since it uses as much as digits as its factorization.

2088721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2088721 is about 1445.2408103842. The cubic root of 2088721 is about 127.8282404898.

It can be divided in two parts, 2088 and 721, that added together give a square (2809 = 53²).

The spelling of 2088721 in words is "two million, eighty-eight thousand, seven hundred twenty-one".