8490954889 has 2 divisors, whose sum is σ = 8490954890. Its totient is φ = 8490954888.

The previous prime is 8490954887. The next prime is 8490954907. The reversal of 8490954889 is 9884590948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6489913600 + 2001041289 = 80560^2 + 44733^2 .

It is a cyclic number.

It is not a de Polignac number, because 8490954889 - 2¹ = 8490954887 is a prime.

Together with 8490954887, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8490954889.

It is not a weakly prime, because it can be changed into another prime (8490954887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245477444 + 4245477445.

It is an arithmetic number, because the mean of its divisors is an integer number (4245477445).

Almost surely, 2^8490954889 is an apocalyptic number.

It is an amenable number.

8490954889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8490954889 is an equidigital number, since it uses as much as digits as its factorization.

8490954889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 64.

The square root of 8490954889 is about 92146.3775142572. The cubic root of 8490954889 is about 2040.1033916104.

The spelling of 8490954889 in words is "eight billion, four hundred ninety million, nine hundred fifty-four thousand, eight hundred eighty-nine".