7872947 has 2 divisors, whose sum is σ = 7872948. Its totient is φ = 7872946.

The previous prime is 7872937. The next prime is 7873001. The reversal of 7872947 is 7492787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7872947 - 2⁶ = 7872883 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 7872898 and 7872907.

It is not a weakly prime, because it can be changed into another prime (7872937) 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 as a sum of consecutive naturals, namely, 3936473 + 3936474.

It is an arithmetic number, because the mean of its divisors is an integer number (3936474).

Almost surely, 2^7872947 is an apocalyptic number.

7872947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872947 is an equidigital number, since it uses as much as digits as its factorization.

7872947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 44.

The square root of 7872947 is about 2805.8772246839. The cubic root of 7872947 is about 198.9355699939.

The spelling of 7872947 in words is "seven million, eight hundred seventy-two thousand, nine hundred forty-seven".