3688919 has 4 divisors (see below), whose sum is σ = 3972696. Its totient is φ = 3405144.

The previous prime is 3688903. The next prime is 3688933. The reversal of 3688919 is 9198863.

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

It is a cyclic number.

It is not a de Polignac number, because 3688919 - 2⁴ = 3688903 is a prime.

It is a super-2 number, since 2×3688919² = 27216246777122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3688919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688939) 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, 141869 + ... + 141894.

It is an arithmetic number, because the mean of its divisors is an integer number (993174).

Almost surely, 2^3688919 is an apocalyptic number.

3688919 is a deficient number, since it is larger than the sum of its proper divisors (283777).

3688919 is a wasteful number, since it uses less digits than its factorization.

3688919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283776.

The product of its digits is 93312, while the sum is 44.

The square root of 3688919 is about 1920.6558775585. The cubic root of 3688919 is about 154.5134796909.

The spelling of 3688919 in words is "three million, six hundred eighty-eight thousand, nine hundred nineteen".