7872787 has 4 divisors (see below), whose sum is σ = 8478400. Its totient is φ = 7267176.

The previous prime is 7872763. The next prime is 7872793.

7872787 is nontrivially palindromic in base 10.

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 7872787 - 2¹¹ = 7870739 is a prime.

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

It is a Duffinian number.

7872787 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7872757) 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, 302787 + ... + 302812.

It is an arithmetic number, because the mean of its divisors is an integer number (2119600).

Almost surely, 2^7872787 is an apocalyptic number.

7872787 is a deficient number, since it is larger than the sum of its proper divisors (605613).

7872787 is a wasteful number, since it uses less digits than its factorization.

7872787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605612.

The product of its digits is 307328, while the sum is 46.

The square root of 7872787 is about 2805.8487129566. The cubic root of 7872787 is about 198.9342223449.

The spelling of 7872787 in words is "seven million, eight hundred seventy-two thousand, seven hundred eighty-seven".