4391789 has 8 divisors (see below), whose sum is σ = 4667160. Its totient is φ = 4124736.

The previous prime is 4391773. The next prime is 4391791. The reversal of 4391789 is 9871934.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1357225 + 3034564 = 1165^2 + 1742^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4391789 - 2⁴ = 4391773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974 + ... + 3119.

It is an arithmetic number, because the mean of its divisors is an integer number (583395).

Almost surely, 2^4391789 is an apocalyptic number.

It is an amenable number.

4391789 is a deficient number, since it is larger than the sum of its proper divisors (275371).

4391789 is a wasteful number, since it uses less digits than its factorization.

4391789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159.

The product of its digits is 54432, while the sum is 41.

The square root of 4391789 is about 2095.6595620472. The cubic root of 4391789 is about 163.7622596341.

The spelling of 4391789 in words is "four million, three hundred ninety-one thousand, seven hundred eighty-nine".