3897947 has 8 divisors (see below), whose sum is σ = 4154976. Its totient is φ = 3644032.

The previous prime is 3897941. The next prime is 3897967. The reversal of 3897947 is 7497983.

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

It is a cyclic number.

It is not a de Polignac number, because 3897947 - 2¹⁰ = 3896923 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 8³ + 9⁵ + 7⁷ + 9⁶ + 4⁸ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3897941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2153 + ... + 3525.

It is an arithmetic number, because the mean of its divisors is an integer number (519372).

Almost surely, 2^3897947 is an apocalyptic number.

3897947 is a deficient number, since it is larger than the sum of its proper divisors (257029).

3897947 is a wasteful number, since it uses less digits than its factorization.

3897947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557.

The product of its digits is 381024, while the sum is 47.

The square root of 3897947 is about 1974.3219089095. The cubic root of 3897947 is about 157.3784667549.

The spelling of 3897947 in words is "three million, eight hundred ninety-seven thousand, nine hundred forty-seven".