4081919 has 4 divisors (see below), whose sum is σ = 4181520. Its totient is φ = 3982320.

The previous prime is 4081897. The next prime is 4081933. The reversal of 4081919 is 9191804.

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 4081919 - 2¹² = 4077823 is a prime.

It is a super-2 number, since 2×4081919² = 33324125445122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4081949) 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, 49739 + ... + 49820.

It is an arithmetic number, because the mean of its divisors is an integer number (1045380).

Almost surely, 2^4081919 is an apocalyptic number.

4081919 is a deficient number, since it is larger than the sum of its proper divisors (99601).

4081919 is an equidigital number, since it uses as much as digits as its factorization.

4081919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99600.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 4081919 is about 2020.3759551133. The cubic root of 4081919 is about 159.8164431444.

The spelling of 4081919 in words is "four million, eighty-one thousand, nine hundred nineteen".