42823559 has 2 divisors, whose sum is σ = 42823560. Its totient is φ = 42823558.

The previous prime is 42823553. The next prime is 42823577. The reversal of 42823559 is 95532824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42823559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42823553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21411779 + 21411780.

It is an arithmetic number, because the mean of its divisors is an integer number (21411780).

Almost surely, 2^42823559 is an apocalyptic number.

42823559 is a deficient number, since it is larger than the sum of its proper divisors (1).

42823559 is an equidigital number, since it uses as much as digits as its factorization.

42823559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 42823559 is about 6543.9711949244. The cubic root of 42823559 is about 349.8599684720.

The spelling of 42823559 in words is "forty-two million, eight hundred twenty-three thousand, five hundred fifty-nine".