3996971 has 4 divisors (see below), whose sum is σ = 4360344. Its totient is φ = 3633600.

The previous prime is 3996961. The next prime is 3996977. The reversal of 3996971 is 1796993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1796993 = 11 ⋅163363.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3996971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3996977) 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, 181670 + ... + 181691.

It is an arithmetic number, because the mean of its divisors is an integer number (1090086).

Almost surely, 2^3996971 is an apocalyptic number.

3996971 is a deficient number, since it is larger than the sum of its proper divisors (363373).

3996971 is a wasteful number, since it uses less digits than its factorization.

3996971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363372.

The product of its digits is 91854, while the sum is 44.

The square root of 3996971 is about 1999.2426065888. The cubic root of 3996971 is about 158.7000264303.

The spelling of 3996971 in words is "three million, nine hundred ninety-six thousand, nine hundred seventy-one".