7978359 has 4 divisors (see below), whose sum is σ = 10637816. Its totient is φ = 5318904.

The previous prime is 7978343. The next prime is 7978367. The reversal of 7978359 is 9538797.

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

It is not a de Polignac number, because 7978359 - 2⁴ = 7978343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1329724 + ... + 1329729.

It is an arithmetic number, because the mean of its divisors is an integer number (2659454).

Almost surely, 2^7978359 is an apocalyptic number.

7978359 is a deficient number, since it is larger than the sum of its proper divisors (2659457).

7978359 is a wasteful number, since it uses less digits than its factorization.

7978359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659456.

The product of its digits is 476280, while the sum is 48.

The square root of 7978359 is about 2824.5989095799. The cubic root of 7978359 is about 199.8194954729.

The spelling of 7978359 in words is "seven million, nine hundred seventy-eight thousand, three hundred fifty-nine".