3999055 has 8 divisors (see below), whose sum is σ = 4809744. Its totient is φ = 3192000.

The previous prime is 3999053. The next prime is 3999067. The reversal of 3999055 is 5509993.

It is a happy number.

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

It is not a de Polignac number, because 3999055 - 2¹ = 3999053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3998999 and 3999017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3280 + ... + 4330.

It is an arithmetic number, because the mean of its divisors is an integer number (601218).

Almost surely, 2^3999055 is an apocalyptic number.

3999055 is a deficient number, since it is larger than the sum of its proper divisors (810689).

3999055 is a wasteful number, since it uses less digits than its factorization.

3999055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817.

The product of its (nonzero) digits is 54675, while the sum is 40.

The square root of 3999055 is about 1999.7637360448. The cubic root of 3999055 is about 158.7276034290.

The spelling of 3999055 in words is "three million, nine hundred ninety-nine thousand, fifty-five".