342489772789 has 2 divisors, whose sum is σ = 342489772790. Its totient is φ = 342489772788.

The previous prime is 342489772787. The next prime is 342489772811. The reversal of 342489772789 is 987277984243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336119338564 + 6370434225 = 579758^2 + 79815^2 .

It is a cyclic number.

It is not a de Polignac number, because 342489772789 - 2¹ = 342489772787 is a prime.

Together with 342489772787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342489772783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171244886394 + 171244886395.

It is an arithmetic number, because the mean of its divisors is an integer number (171244886395).

Almost surely, 2^342489772789 is an apocalyptic number.

It is an amenable number.

342489772789 is a deficient number, since it is larger than the sum of its proper divisors (1).

342489772789 is an equidigital number, since it uses as much as digits as its factorization.

342489772789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 341397504, while the sum is 70.

The spelling of 342489772789 in words is "three hundred forty-two billion, four hundred eighty-nine million, seven hundred seventy-two thousand, seven hundred eighty-nine".