4243691 has 4 divisors (see below), whose sum is σ = 4247832. Its totient is φ = 4239552.

The previous prime is 4243667. The next prime is 4243699. The reversal of 4243691 is 1963424.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4243691 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2¹⁵ + 4¹¹ + 3² + 6³ + 9 + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731 + ... + 3003.

It is an arithmetic number, because the mean of its divisors is an integer number (1061958).

Almost surely, 2^4243691 is an apocalyptic number.

4243691 is a deficient number, since it is larger than the sum of its proper divisors (4141).

4243691 is a wasteful number, since it uses less digits than its factorization.

4243691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140.

The product of its digits is 5184, while the sum is 29.

The square root of 4243691 is about 2060.0220872602. The cubic root of 4243691 is about 161.9003985629.

The spelling of 4243691 in words is "four million, two hundred forty-three thousand, six hundred ninety-one".