3929689 has 4 divisors (see below), whose sum is σ = 3934480. Its totient is φ = 3924900.

The previous prime is 3929687. The next prime is 3929699. The reversal of 3929689 is 9869293.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9869293 = 7 ⋅1409899.

It is a cyclic number.

It is not a de Polignac number, because 3929689 - 2¹ = 3929687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3929683) 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, 819 + ... + 2920.

It is an arithmetic number, because the mean of its divisors is an integer number (983620).

Almost surely, 2^3929689 is an apocalyptic number.

It is an amenable number.

3929689 is a deficient number, since it is larger than the sum of its proper divisors (4791).

3929689 is a wasteful number, since it uses less digits than its factorization.

3929689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790.

The product of its digits is 209952, while the sum is 46.

The square root of 3929689 is about 1982.3443192342. The cubic root of 3929689 is about 157.8045037088.

The spelling of 3929689 in words is "three million, nine hundred twenty-nine thousand, six hundred eighty-nine".