3993919 has 4 divisors (see below), whose sum is σ = 4078944. Its totient is φ = 3908896.

The previous prime is 3993911. The next prime is 3993943. The reversal of 3993919 is 9193993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9193993 = 83 ⋅110771.

It is not a de Polignac number, because 3993919 - 2³ = 3993911 is a prime.

It is a super-2 number, since 2×3993919² = 31902777957122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

3993919 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993911) 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, 42442 + ... + 42535.

It is an arithmetic number, because the mean of its divisors is an integer number (1019736).

Almost surely, 2^3993919 is an apocalyptic number.

3993919 is a deficient number, since it is larger than the sum of its proper divisors (85025).

3993919 is an equidigital number, since it uses as much as digits as its factorization.

3993919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85024.

The product of its digits is 59049, while the sum is 43.

The square root of 3993919 is about 1998.4791717704. The cubic root of 3993919 is about 158.6596228503.

The spelling of 3993919 in words is "three million, nine hundred ninety-three thousand, nine hundred nineteen".