7978163 has 4 divisors (see below), whose sum is σ = 7987080. Its totient is φ = 7969248.

The previous prime is 7978099. The next prime is 7978169. The reversal of 7978163 is 3618797.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7978163 - 2⁶ = 7978099 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 7978163.

It is not an unprimeable number, because it can be changed into a prime (7978169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2945 + ... + 4962.

It is an arithmetic number, because the mean of its divisors is an integer number (1996770).

Almost surely, 2^7978163 is an apocalyptic number.

7978163 is a deficient number, since it is larger than the sum of its proper divisors (8917).

7978163 is a wasteful number, since it uses less digits than its factorization.

7978163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8916.

The product of its digits is 63504, while the sum is 41.

The square root of 7978163 is about 2824.5642141753. The cubic root of 7978163 is about 199.8178591740.

The spelling of 7978163 in words is "seven million, nine hundred seventy-eight thousand, one hundred sixty-three".