3985919 has 4 divisors (see below), whose sum is σ = 4555344. Its totient is φ = 3416496.

The previous prime is 3985903. The next prime is 3985951. The reversal of 3985919 is 9195893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9195893 = 7 ⋅1313699.

It is a cyclic number.

It is not a de Polignac number, because 3985919 - 2⁴ = 3985903 is a prime.

It is a super-2 number, since 2×3985919² = 31775100549122, which contains 22 as substring.

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 3985919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985999) 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, 284702 + ... + 284715.

It is an arithmetic number, because the mean of its divisors is an integer number (1138836).

Almost surely, 2^3985919 is an apocalyptic number.

3985919 is a deficient number, since it is larger than the sum of its proper divisors (569425).

3985919 is an equidigital number, since it uses as much as digits as its factorization.

3985919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569424.

The product of its digits is 87480, while the sum is 44.

The square root of 3985919 is about 1996.4766464950. The cubic root of 3985919 is about 158.5536179129.

It can be divided in two parts, 39 and 85919, that added together give a palindrome (85958).

The spelling of 3985919 in words is "three million, nine hundred eighty-five thousand, nine hundred nineteen".