3989613 has 4 divisors (see below), whose sum is σ = 5319488. Its totient is φ = 2659740.

The previous prime is 3989593. The next prime is 3989641. The reversal of 3989613 is 3169893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3989613 - 2¹³ = 3981421 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989653) 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, 664933 + ... + 664938.

It is an arithmetic number, because the mean of its divisors is an integer number (1329872).

Almost surely, 2^3989613 is an apocalyptic number.

It is an amenable number.

3989613 is a deficient number, since it is larger than the sum of its proper divisors (1329875).

3989613 is a wasteful number, since it uses less digits than its factorization.

3989613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329874.

The product of its digits is 34992, while the sum is 39.

The square root of 3989613 is about 1997.4015620300. The cubic root of 3989613 is about 158.6025833020.

It can be divided in two parts, 398 and 9613, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 3989613 in words is "three million, nine hundred eighty-nine thousand, six hundred thirteen".