8798686621 has 2 divisors, whose sum is σ = 8798686622. Its totient is φ = 8798686620.

The previous prime is 8798686613. The next prime is 8798686643. The reversal of 8798686621 is 1266868978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8763580996 + 35105625 = 93614^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 8798686621 - 2³ = 8798686613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8798686621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8798686601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4399343310 + 4399343311.

It is an arithmetic number, because the mean of its divisors is an integer number (4399343311).

Almost surely, 2^8798686621 is an apocalyptic number.

It is an amenable number.

8798686621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8798686621 is an equidigital number, since it uses as much as digits as its factorization.

8798686621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592, while the sum is 61.

The square root of 8798686621 is about 93801.3146016622. The cubic root of 8798686621 is about 2064.4575155733.

The spelling of 8798686621 in words is "eight billion, seven hundred ninety-eight million, six hundred eighty-six thousand, six hundred twenty-one".