84257734349 has 2 divisors, whose sum is σ = 84257734350. Its totient is φ = 84257734348.

The previous prime is 84257734339. The next prime is 84257734367. The reversal of 84257734349 is 94343775248.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74470589449 + 9787144900 = 272893^2 + 98930^2 .

It is a cyclic number.

It is not a de Polignac number, because 84257734349 - 2²⁴ = 84240957133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84257734294 and 84257734303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84257734339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42128867174 + 42128867175.

It is an arithmetic number, because the mean of its divisors is an integer number (42128867175).

Almost surely, 2^84257734349 is an apocalyptic number.

It is an amenable number.

84257734349 is a deficient number, since it is larger than the sum of its proper divisors (1).

84257734349 is an equidigital number, since it uses as much as digits as its factorization.

84257734349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 56.

The spelling of 84257734349 in words is "eighty-four billion, two hundred fifty-seven million, seven hundred thirty-four thousand, three hundred forty-nine".