2647385989 has 2 divisors, whose sum is σ = 2647385990. Its totient is φ = 2647385988.

The previous prime is 2647385977. The next prime is 2647385999. The reversal of 2647385989 is 9895837462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1409401764 + 1237984225 = 37542^2 + 35185^2 .

It is a cyclic number.

It is not a de Polignac number, because 2647385989 - 2⁷ = 2647385861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2647385929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323692994 + 1323692995.

It is an arithmetic number, because the mean of its divisors is an integer number (1323692995).

Almost surely, 2^2647385989 is an apocalyptic number.

It is an amenable number.

2647385989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647385989 is an equidigital number, since it uses as much as digits as its factorization.

2647385989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 61.

The square root of 2647385989 is about 51452.7549213839. The cubic root of 2647385989 is about 1383.3723425912.

The spelling of 2647385989 in words is "two billion, six hundred forty-seven million, three hundred eighty-five thousand, nine hundred eighty-nine".