7898979111 has 4 divisors (see below), whose sum is σ = 10531972152. Its totient is φ = 5265986072.

The previous prime is 7898979103. The next prime is 7898979163. The reversal of 7898979111 is 1119798987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1119798987 = 3 ⋅373266329.

It is a cyclic number.

It is not a de Polignac number, because 7898979111 - 2³ = 7898979103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7898979311) 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, 1316496516 + ... + 1316496521.

It is an arithmetic number, because the mean of its divisors is an integer number (2632993038).

Almost surely, 2^7898979111 is an apocalyptic number.

7898979111 is a deficient number, since it is larger than the sum of its proper divisors (2632993041).

7898979111 is a wasteful number, since it uses less digits than its factorization.

7898979111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632993040.

The product of its digits is 2286144, while the sum is 60.

The square root of 7898979111 is about 88876.2010382982. The cubic root of 7898979111 is about 1991.5459070922.

The spelling of 7898979111 in words is "seven billion, eight hundred ninety-eight million, nine hundred seventy-nine thousand, one hundred eleven".