7898668987 has 8 divisors (see below), whose sum is σ = 8617768560. Its totient is φ = 7179742560.

The previous prime is 7898668931. The next prime is 7898669003.

7898668987 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7898668987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7898668907) 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, 63589 + ... + 140857.

It is an arithmetic number, because the mean of its divisors is an integer number (1077221070).

Almost surely, 2^7898668987 is an apocalyptic number.

7898668987 is a deficient number, since it is larger than the sum of its proper divisors (719099573).

7898668987 is a wasteful number, since it uses less digits than its factorization.

7898668987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86573.

The product of its digits is 585252864, while the sum is 76.

The square root of 7898668987 is about 88874.4563246381. The cubic root of 7898668987 is about 1991.5198432065.

The spelling of 7898668987 in words is "seven billion, eight hundred ninety-eight million, six hundred sixty-eight thousand, nine hundred eighty-seven".