2217963889 has 2 divisors, whose sum is σ = 2217963890. Its totient is φ = 2217963888.

The previous prime is 2217963883. The next prime is 2217963961. The reversal of 2217963889 is 9883697122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1901657664 + 316306225 = 43608^2 + 17785^2 .

It is a cyclic number.

It is not a de Polignac number, because 2217963889 - 2⁵ = 2217963857 is a prime.

It is not a weakly prime, because it can be changed into another prime (2217963883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108981944 + 1108981945.

It is an arithmetic number, because the mean of its divisors is an integer number (1108981945).

Almost surely, 2^2217963889 is an apocalyptic number.

It is an amenable number.

2217963889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217963889 is an equidigital number, since it uses as much as digits as its factorization.

2217963889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 2217963889 is about 47095.2639763278. The cubic root of 2217963889 is about 1304.1218068512.

It can be divided in two parts, 22179 and 63889, that added together give a palindrome (86068).

The spelling of 2217963889 in words is "two billion, two hundred seventeen million, nine hundred sixty-three thousand, eight hundred eighty-nine".