42323857409 has 2 divisors, whose sum is σ = 42323857410. Its totient is φ = 42323857408.

The previous prime is 42323857361. The next prime is 42323857439. The reversal of 42323857409 is 90475832324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38426976784 + 3896880625 = 196028^2 + 62425^2 .

It is a cyclic number.

It is not a de Polignac number, because 42323857409 - 2²⁰ = 42322808833 is a prime.

It is not a weakly prime, because it can be changed into another prime (42323857439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21161928704 + 21161928705.

It is an arithmetic number, because the mean of its divisors is an integer number (21161928705).

Almost surely, 2^42323857409 is an apocalyptic number.

It is an amenable number.

42323857409 is a deficient number, since it is larger than the sum of its proper divisors (1).

42323857409 is an equidigital number, since it uses as much as digits as its factorization.

42323857409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 47.

The spelling of 42323857409 in words is "forty-two billion, three hundred twenty-three million, eight hundred fifty-seven thousand, four hundred nine".