7897647 has 4 divisors (see below), whose sum is σ = 10530200. Its totient is φ = 5265096.

The previous prime is 7897633. The next prime is 7897649. The reversal of 7897647 is 7467987.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7897647 - 2¹⁸ = 7635503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7897596 and 7897605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316272 + ... + 1316277.

It is an arithmetic number, because the mean of its divisors is an integer number (2632550).

Almost surely, 2^7897647 is an apocalyptic number.

7897647 is a deficient number, since it is larger than the sum of its proper divisors (2632553).

7897647 is a wasteful number, since it uses less digits than its factorization.

7897647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632552.

The product of its digits is 592704, while the sum is 48.

The square root of 7897647 is about 2810.2752534227. The cubic root of 7897647 is about 199.1433947081.

The spelling of 7897647 in words is "seven million, eight hundred ninety-seven thousand, six hundred forty-seven".