5721669 has 12 divisors (see below), whose sum is σ = 8287500. Its totient is φ = 3803904.

The previous prime is 5721659. The next prime is 5721689. The reversal of 5721669 is 9661275.

It can be written as a sum of positive squares in 2 ways, for example, as 3560769 + 2160900 = 1887^2 + 1470^2 .

It is not a de Polignac number, because 5721669 - 2¹¹ = 5719621 is a prime.

It is a super-2 number, since 2×5721669² = 65474992291122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5721619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3957 + ... + 5205.

It is an arithmetic number, because the mean of its divisors is an integer number (690625).

Almost surely, 2^5721669 is an apocalyptic number.

It is an amenable number.

5721669 is a deficient number, since it is larger than the sum of its proper divisors (2565831).

5721669 is a wasteful number, since it uses less digits than its factorization.

5721669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764 (or 1761 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 5721669 is about 2392.0010451503. The cubic root of 5721669 is about 178.8576732408.

The spelling of 5721669 in words is "five million, seven hundred twenty-one thousand, six hundred sixty-nine".