3821999 has 8 divisors (see below), whose sum is σ = 3898800. Its totient is φ = 3746176.

The previous prime is 3821981. The next prime is 3822017. The reversal of 3821999 is 9991283.

It is an interprime number because it is at equal distance from previous prime (3821981) and next prime (3822017).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3821999 - 2¹² = 3817903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16724 + ... + 16950.

It is an arithmetic number, because the mean of its divisors is an integer number (487350).

Almost surely, 2^3821999 is an apocalyptic number.

3821999 is a deficient number, since it is larger than the sum of its proper divisors (76801).

3821999 is a wasteful number, since it uses less digits than its factorization.

3821999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its digits is 34992, while the sum is 41.

The square root of 3821999 is about 1954.9933503723. The cubic root of 3821999 is about 156.3496294732.

The spelling of 3821999 in words is "three million, eight hundred twenty-one thousand, nine hundred ninety-nine".