3972647 has 8 divisors (see below), whose sum is σ = 4617600. Its totient is φ = 3347064.

The previous prime is 3972643. The next prime is 3972649. The reversal of 3972647 is 7462793.

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

It is not a de Polignac number, because 3972647 - 2² = 3972643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3972647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972643) 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, 4397 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (577200).

Almost surely, 2^3972647 is an apocalyptic number.

3972647 is a deficient number, since it is larger than the sum of its proper divisors (644953).

3972647 is an equidigital number, since it uses as much as digits as its factorization.

3972647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9685.

The product of its digits is 63504, while the sum is 38.

The square root of 3972647 is about 1993.1500194416. The cubic root of 3972647 is about 158.3774424353.

The spelling of 3972647 in words is "three million, nine hundred seventy-two thousand, six hundred forty-seven".