3999823042 has 4 divisors (see below), whose sum is σ = 5999734566. Its totient is φ = 1999911520.

The previous prime is 3999823031. The next prime is 3999823067. The reversal of 3999823042 is 2403289993.

3999823042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3302915841 + 696907201 = 57471^2 + 26399^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999955759 + ... + 999955762.

Almost surely, 2^3999823042 is an apocalyptic number.

3999823042 is a deficient number, since it is larger than the sum of its proper divisors (1999911524).

3999823042 is a wasteful number, since it uses less digits than its factorization.

3999823042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999911523.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 3999823042 is about 63244.1542120693. The cubic root of 3999823042 is about 1587.3776430134.

The spelling of 3999823042 in words is "three billion, nine hundred ninety-nine million, eight hundred twenty-three thousand, forty-two".