488888909 has 2 divisors, whose sum is σ = 488888910. Its totient is φ = 488888908.

The previous prime is 488888857. The next prime is 488888923. The reversal of 488888909 is 909888884.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349129225 + 139759684 = 18685^2 + 11822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-488888909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (488888929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244444454 + 244444455.

It is an arithmetic number, because the mean of its divisors is an integer number (244444455).

Almost surely, 2^488888909 is an apocalyptic number.

It is an amenable number.

488888909 is a deficient number, since it is larger than the sum of its proper divisors (1).

488888909 is an equidigital number, since it uses as much as digits as its factorization.

488888909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10616832, while the sum is 62.

The square root of 488888909 is about 22110.8323904823. The cubic root of 488888909 is about 787.7771777804. Note that the first 3 decimals are identical.

The spelling of 488888909 in words is "four hundred eighty-eight million, eight hundred eighty-eight thousand, nine hundred nine".