7920847 has 8 divisors (see below), whose sum is σ = 8663040. Its totient is φ = 7182360.

The previous prime is 7920833. The next prime is 7920883. The reversal of 7920847 is 7480297.

It is a happy number.

7920847 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7920847 is a prime.

It is a Duffinian number.

7920847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920817) 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, 5554 + ... + 6832.

It is an arithmetic number, because the mean of its divisors is an integer number (1082880).

Almost surely, 2^7920847 is an apocalyptic number.

7920847 is a deficient number, since it is larger than the sum of its proper divisors (742193).

7920847 is a wasteful number, since it uses less digits than its factorization.

7920847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 7920847 is about 2814.3999360432. The cubic root of 7920847 is about 199.3382042138.

The spelling of 7920847 in words is "seven million, nine hundred twenty thousand, eight hundred forty-seven".