489226781969 has 2 divisors, whose sum is σ = 489226781970. Its totient is φ = 489226781968.

The previous prime is 489226781963. The next prime is 489226781971. The reversal of 489226781969 is 969187622984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289831489600 + 199395292369 = 538360^2 + 446537^2 .

It is a cyclic number.

It is not a de Polignac number, because 489226781969 - 2³⁶ = 420507305233 is a prime.

It is a super-2 number, since 2×489226781969² (a number of 24 digits) contains 22 as substring.

Together with 489226781971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (489226781963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244613390984 + 244613390985.

It is an arithmetic number, because the mean of its divisors is an integer number (244613390985).

Almost surely, 2^489226781969 is an apocalyptic number.

It is an amenable number.

489226781969 is a deficient number, since it is larger than the sum of its proper divisors (1).

489226781969 is an equidigital number, since it uses as much as digits as its factorization.

489226781969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188116992, while the sum is 71.

The spelling of 489226781969 in words is "four hundred eighty-nine billion, two hundred twenty-six million, seven hundred eighty-one thousand, nine hundred sixty-nine".