3990673 has 4 divisors (see below), whose sum is σ = 4019940. Its totient is φ = 3961408.

The previous prime is 3990641. The next prime is 3990689. The reversal of 3990673 is 3760993.

3990673 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, and also an emirpimes, since its reverse is a distinct semiprime: 3760993 = 19 ⋅197947.

It can be written as a sum of positive squares in 2 ways, for example, as 1658944 + 2331729 = 1288^2 + 1527^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990673 - 2⁵ = 3990641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3990073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14428 + ... + 14701.

It is an arithmetic number, because the mean of its divisors is an integer number (1004985).

Almost surely, 2^3990673 is an apocalyptic number.

It is an amenable number.

3990673 is a deficient number, since it is larger than the sum of its proper divisors (29267).

3990673 is a wasteful number, since it uses less digits than its factorization.

3990673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29266.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 3990673 is about 1997.6668891484. Note that the first 3 decimals coincide. The cubic root of 3990673 is about 158.6166284279.

The spelling of 3990673 in words is "three million, nine hundred ninety thousand, six hundred seventy-three".