3989345 has 4 divisors (see below), whose sum is σ = 4787220. Its totient is φ = 3191472.

The previous prime is 3989333. The next prime is 3989351. The reversal of 3989345 is 5439893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5439893 = 157 ⋅34649.

It can be written as a sum of positive squares in 2 ways, for example, as 1577536 + 2411809 = 1256^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989345 - 2⁴ = 3989329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398930 + ... + 398939.

It is an arithmetic number, because the mean of its divisors is an integer number (1196805).

Almost surely, 2^3989345 is an apocalyptic number.

It is an amenable number.

3989345 is a deficient number, since it is larger than the sum of its proper divisors (797875).

3989345 is an equidigital number, since it uses as much as digits as its factorization.

3989345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797874.

The product of its digits is 116640, while the sum is 41.

The square root of 3989345 is about 1997.3344737424. The cubic root of 3989345 is about 158.5990318761.

It can be divided in two parts, 3989 and 345, that added together give a palindrome (4334).

The spelling of 3989345 in words is "three million, nine hundred eighty-nine thousand, three hundred forty-five".