3919689 has 12 divisors (see below), whose sum is σ = 5680116. Its totient is φ = 2604672.

The previous prime is 3919687. The next prime is 3919711. The reversal of 3919689 is 9869193.

It can be written as a sum of positive squares in 2 ways, for example, as 2585664 + 1334025 = 1608^2 + 1155^2 .

It is not a de Polignac number, because 3919689 - 2¹ = 3919687 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3919687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3637 + ... + 4589.

It is an arithmetic number, because the mean of its divisors is an integer number (473343).

Almost surely, 2^3919689 is an apocalyptic number.

It is an amenable number.

3919689 is a deficient number, since it is larger than the sum of its proper divisors (1760427).

3919689 is a wasteful number, since it uses less digits than its factorization.

3919689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 1413 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 3919689 is about 1979.8204464042. The cubic root of 3919689 is about 157.6705333531.

The spelling of 3919689 in words is "three million, nine hundred nineteen thousand, six hundred eighty-nine".