7898989877 has 8 divisors (see below), whose sum is σ = 8084889120. Its totient is φ = 7713190800.

The previous prime is 7898989867. The next prime is 7898989919. The reversal of 7898989877 is 7789898987.

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 7898989877 - 2¹² = 7898985781 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 (7898989867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148502 + ... + 194552.

It is an arithmetic number, because the mean of its divisors is an integer number (1010611140).

Almost surely, 2^7898989877 is an apocalyptic number.

It is an amenable number.

7898989877 is a deficient number, since it is larger than the sum of its proper divisors (185899243).

7898989877 is a wasteful number, since it uses less digits than its factorization.

7898989877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50083.

The product of its digits is 1024192512, while the sum is 80.

The square root of 7898989877 is about 88876.2616056729. The cubic root of 7898989877 is about 1991.5468118916.

The spelling of 7898989877 in words is "seven billion, eight hundred ninety-eight million, nine hundred eighty-nine thousand, eight hundred seventy-seven".