3665723 has 4 divisors (see below), whose sum is σ = 3678528. Its totient is φ = 3652920.

The previous prime is 3665677. The next prime is 3665731. The reversal of 3665723 is 3275663.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3665723 - 2¹⁶ = 3600187 is a prime.

It is a super-2 number, since 2×3665723² = 26875050225458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3665723.

It is not an unprimeable number, because it can be changed into a prime (3665023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5963 + ... + 6548.

It is an arithmetic number, because the mean of its divisors is an integer number (919632).

Almost surely, 2^3665723 is an apocalyptic number.

3665723 is a deficient number, since it is larger than the sum of its proper divisors (12805).

3665723 is a wasteful number, since it uses less digits than its factorization.

3665723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12804.

The product of its digits is 22680, while the sum is 32.

The square root of 3665723 is about 1914.6077927346. The cubic root of 3665723 is about 154.1889371609.

The spelling of 3665723 in words is "three million, six hundred sixty-five thousand, seven hundred twenty-three".