4013689 has 4 divisors (see below), whose sum is σ = 4043124. Its totient is φ = 3984256.

The previous prime is 4013671. The next prime is 4013699. The reversal of 4013689 is 9863104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2585664 + 1428025 = 1608^2 + 1195^2 .

It is a cyclic number.

It is not a de Polignac number, because 4013689 - 2⁷ = 4013561 is a prime.

It is a super-2 number, since 2×4013689² = 32219398777442, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4013689.

It is not an unprimeable number, because it can be changed into a prime (4013699) 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, 14512 + ... + 14785.

It is an arithmetic number, because the mean of its divisors is an integer number (1010781).

Almost surely, 2^4013689 is an apocalyptic number.

It is an amenable number.

4013689 is a deficient number, since it is larger than the sum of its proper divisors (29435).

4013689 is a wasteful number, since it uses less digits than its factorization.

4013689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29434.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 4013689 is about 2003.4193270506. The cubic root of 4013689 is about 158.9209817935.

The spelling of 4013689 in words is "four million, thirteen thousand, six hundred eighty-nine".