3990093 has 4 divisors (see below), whose sum is σ = 5320128. Its totient is φ = 2660060.

The previous prime is 3990083. The next prime is 3990097. The reversal of 3990093 is 3900993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3990093 - 2⁵ = 3990061 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665013 + ... + 665018.

It is an arithmetic number, because the mean of its divisors is an integer number (1330032).

Almost surely, 2^3990093 is an apocalyptic number.

It is an amenable number.

3990093 is a deficient number, since it is larger than the sum of its proper divisors (1330035).

3990093 is a wasteful number, since it uses less digits than its factorization.

3990093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330034.

The product of its (nonzero) digits is 6561, while the sum is 33.

The square root of 3990093 is about 1997.5217145253. The cubic root of 3990093 is about 158.6089436672.

It can be divided in two parts, 39900 and 93, that added together give a palindrome (39993).

The spelling of 3990093 in words is "three million, nine hundred ninety thousand, ninety-three".