3589721 has 2 divisors, whose sum is σ = 3589722. Its totient is φ = 3589720.

The previous prime is 3589717. The next prime is 3589739. The reversal of 3589721 is 1279853.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 1729225 = 1364^2 + 1315^2 .

It is an emirp because it is prime and its reverse (1279853) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3589721 - 2² = 3589717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3589741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1794860 + 1794861.

It is an arithmetic number, because the mean of its divisors is an integer number (1794861).

Almost surely, 2^3589721 is an apocalyptic number.

It is an amenable number.

3589721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3589721 is an equidigital number, since it uses as much as digits as its factorization.

3589721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 3589721 is about 1894.6559054351. The cubic root of 3589721 is about 153.1158790069.

The spelling of 3589721 in words is "three million, five hundred eighty-nine thousand, seven hundred twenty-one".