647350889 has 2 divisors, whose sum is σ = 647350890. Its totient is φ = 647350888.

The previous prime is 647350883. The next prime is 647350901. The reversal of 647350889 is 988053746.

647350889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479259664 + 168091225 = 21892^2 + 12965^2 .

It is a cyclic number.

It is not a de Polignac number, because 647350889 - 2²⁰ = 646302313 is a prime.

It is not a weakly prime, because it can be changed into another prime (647350883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323675444 + 323675445.

It is an arithmetic number, because the mean of its divisors is an integer number (323675445).

Almost surely, 2^647350889 is an apocalyptic number.

It is an amenable number.

647350889 is a deficient number, since it is larger than the sum of its proper divisors (1).

647350889 is an equidigital number, since it uses as much as digits as its factorization.

647350889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 647350889 is about 25443.0911840523. The cubic root of 647350889 is about 865.0607011875.

The spelling of 647350889 in words is "six hundred forty-seven million, three hundred fifty thousand, eight hundred eighty-nine".