7987279 has 8 divisors (see below), whose sum is σ = 8472672. Its totient is φ = 7513440.

The previous prime is 7987253. The next prime is 7987289. The reversal of 7987279 is 9727897.

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 7987279 - 2⁵ = 7987247 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 (7987249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444 + ... + 4249.

It is an arithmetic number, because the mean of its divisors is an integer number (1059084).

Almost surely, 2^7987279 is an apocalyptic number.

7987279 is a deficient number, since it is larger than the sum of its proper divisors (485393).

7987279 is a wasteful number, since it uses less digits than its factorization.

7987279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777.

The product of its digits is 444528, while the sum is 49.

The square root of 7987279 is about 2826.1774537350. The cubic root of 7987279 is about 199.8939354281.

It can be divided in two parts, 79 and 87279, that multiplied together give a triangular number (6895041 = T₃₇₁₃).

The spelling of 7987279 in words is "seven million, nine hundred eighty-seven thousand, two hundred seventy-nine".