42850709789309 has 2 divisors, whose sum is σ = 42850709789310. Its totient is φ = 42850709789308.

The previous prime is 42850709789287. The next prime is 42850709789347. The reversal of 42850709789309 is 90398790705824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36578424960100 + 6272284829209 = 6048010^2 + 2504453^2 .

It is a cyclic number.

It is not a de Polignac number, because 42850709789309 - 2²⁰ = 42850708740733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42850708789309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425354894654 + 21425354894655.

It is an arithmetic number, because the mean of its divisors is an integer number (21425354894655).

Almost surely, 2^{42850709789309} is an apocalyptic number.

It is an amenable number.

42850709789309 is a deficient number, since it is larger than the sum of its proper divisors (1).

42850709789309 is an equidigital number, since it uses as much as digits as its factorization.

42850709789309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 274337280, while the sum is 71.

The spelling of 42850709789309 in words is "forty-two trillion, eight hundred fifty billion, seven hundred nine million, seven hundred eighty-nine thousand, three hundred nine".