7920947 has 8 divisors (see below), whose sum is σ = 8305440. Its totient is φ = 7539840.

The previous prime is 7920893. The next prime is 7920949. The reversal of 7920947 is 7490297.

It is a happy number.

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 7920947 - 2⁶ = 7920883 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 7920947.

It is not an unprimeable number, because it can be changed into a prime (7920949) 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, 4829 + ... + 6257.

It is an arithmetic number, because the mean of its divisors is an integer number (1038180).

Almost surely, 2^7920947 is an apocalyptic number.

7920947 is a deficient number, since it is larger than the sum of its proper divisors (384493).

7920947 is a wasteful number, since it uses less digits than its factorization.

7920947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 7920947 is about 2814.4177017635. The cubic root of 7920947 is about 199.3390430860.

The spelling of 7920947 in words is "seven million, nine hundred twenty thousand, nine hundred forty-seven".