3961789 has 8 divisors (see below), whose sum is σ = 4371192. Its totient is φ = 3567360.

The previous prime is 3961781. The next prime is 3961813. The reversal of 3961789 is 9871693.

It can be written as a sum of positive squares in 4 ways, for example, as 476100 + 3485689 = 690^2 + 1867^2 .

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 3961789 - 2³ = 3961781 is a prime.

It is a Duffinian number.

3961789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3961781) 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, 3184 + ... + 4249.

It is an arithmetic number, because the mean of its divisors is an integer number (546399).

Almost surely, 2^3961789 is an apocalyptic number.

It is an amenable number.

3961789 is a deficient number, since it is larger than the sum of its proper divisors (409403).

3961789 is a wasteful number, since it uses less digits than its factorization.

3961789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487.

The product of its digits is 81648, while the sum is 43.

The square root of 3961789 is about 1990.4243266198. The cubic root of 3961789 is about 158.2330188831.

The spelling of 3961789 in words is "three million, nine hundred sixty-one thousand, seven hundred eighty-nine".