7949887879 has 4 divisors (see below), whose sum is σ = 8031845584. Its totient is φ = 7867930176.

The previous prime is 7949887853. The next prime is 7949887903. The reversal of 7949887879 is 9787889497.

7949887879 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9787889497 = 101 ⋅96909797.

It is a cyclic number.

It is not a de Polignac number, because 7949887879 - 2²⁹ = 7413016967 is a prime.

It is a super-2 number, since 2×7949887879² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7949881879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40978707 + ... + 40978900.

It is an arithmetic number, because the mean of its divisors is an integer number (2007961396).

Almost surely, 2^7949887879 is an apocalyptic number.

7949887879 is a deficient number, since it is larger than the sum of its proper divisors (81957705).

7949887879 is an equidigital number, since it uses as much as digits as its factorization.

7949887879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81957704.

The product of its digits is 512096256, while the sum is 76.

The square root of 7949887879 is about 89162.1437550713. The cubic root of 7949887879 is about 1995.8152399152.

The spelling of 7949887879 in words is "seven billion, nine hundred forty-nine million, eight hundred eighty-seven thousand, eight hundred seventy-nine".