7879779787 has 6 divisors (see below), whose sum is σ = 8661245684. Its totient is φ = 7163436060.

The previous prime is 7879779767. The next prime is 7879779793.

7879779787 is nontrivially palindromic in base 10.

7879779787 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7879779787 - 2¹¹ = 7879777739 is a prime.

It is a super-2 number, since 2×7879779787² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7879779727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32560953 + ... + 32561194.

Almost surely, 2^7879779787 is an apocalyptic number.

7879779787 is a deficient number, since it is larger than the sum of its proper divisors (781465897).

7879779787 is a wasteful number, since it uses less digits than its factorization.

7879779787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65122169 (or 65122158 counting only the distinct ones).

The product of its digits is 609892416, while the sum is 76.

The square root of 7879779787 is about 88768.1237100346. The cubic root of 7879779787 is about 1989.9310420285.

The spelling of 7879779787 in words is "seven billion, eight hundred seventy-nine million, seven hundred seventy-nine thousand, seven hundred eighty-seven".