7897879 has 4 divisors (see below), whose sum is σ = 8615880. Its totient is φ = 7179880.

The previous prime is 7897873. The next prime is 7897907. The reversal of 7897879 is 9787987.

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

It is a cyclic number.

It is not a de Polignac number, because 7897879 - 2⁵ = 7897847 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 (7897873) 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 in 3 ways as a sum of consecutive naturals, for example, 358984 + ... + 359005.

It is an arithmetic number, because the mean of its divisors is an integer number (2153970).

Almost surely, 2^7897879 is an apocalyptic number.

7897879 is a deficient number, since it is larger than the sum of its proper divisors (718001).

7897879 is a wasteful number, since it uses less digits than its factorization.

7897879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718000.

The product of its digits is 1778112, while the sum is 55.

The square root of 7897879 is about 2810.3165302151. The cubic root of 7897879 is about 199.1453446904.

It can be divided in two parts, 789 and 7879, that added together give a palindrome (8668).

The spelling of 7897879 in words is "seven million, eight hundred ninety-seven thousand, eight hundred seventy-nine".