3990071 has 8 divisors (see below), whose sum is σ = 4092000. Its totient is φ = 3889440.

The previous prime is 3990061. The next prime is 3990073. The reversal of 3990071 is 1700993.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3990071 is a prime.

It is a Duffinian number.

It is a congruent 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8870 + ... + 9308.

It is an arithmetic number, because the mean of its divisors is an integer number (511500).

Almost surely, 2^3990071 is an apocalyptic number.

3990071 is a deficient number, since it is larger than the sum of its proper divisors (101929).

3990071 is a wasteful number, since it uses less digits than its factorization.

3990071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 1701, while the sum is 29.

The square root of 3990071 is about 1997.5162076939. The cubic root of 3990071 is about 158.6086521616.

The spelling of 3990071 in words is "three million, nine hundred ninety thousand, seventy-one".