3990993 has 8 divisors (see below), whose sum is σ = 5371488. Its totient is φ = 2635584.

The previous prime is 3990979. The next prime is 3990997.

3990993 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 3990993 - 2⁴ = 3990977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3990997) 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, 5896 + ... + 6537.

It is an arithmetic number, because the mean of its divisors is an integer number (671436).

Almost surely, 2^3990993 is an apocalyptic number.

It is an amenable number.

3990993 is a deficient number, since it is larger than the sum of its proper divisors (1380495).

3990993 is a wasteful number, since it uses less digits than its factorization.

3990993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12543.

The product of its (nonzero) digits is 59049, while the sum is 42.

The square root of 3990993 is about 1997.7469809763. The cubic root of 3990993 is about 158.6208679772.

The spelling of 3990993 in words is "three million, nine hundred ninety thousand, nine hundred ninety-three".