3997047 has 8 divisors (see below), whose sum is σ = 5501440. Its totient is φ = 2578680.

The previous prime is 3997043. The next prime is 3997051. The reversal of 3997047 is 7407993.

It is an interprime number because it is at equal distance from previous prime (3997043) and next prime (3997051).

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

It is not a de Polignac number, because 3997047 - 2² = 3997043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3996996 and 3997014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21397 + ... + 21582.

It is an arithmetic number, because the mean of its divisors is an integer number (687680).

Almost surely, 2^3997047 is an apocalyptic number.

3997047 is a deficient number, since it is larger than the sum of its proper divisors (1504393).

3997047 is a wasteful number, since it uses less digits than its factorization.

3997047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43013.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 3997047 is about 1999.2616136964. The cubic root of 3997047 is about 158.7010322858.

The spelling of 3997047 in words is "three million, nine hundred ninety-seven thousand, forty-seven".