42839773 has 2 divisors, whose sum is σ = 42839774. Its totient is φ = 42839772.

The previous prime is 42839729. The next prime is 42839789. The reversal of 42839773 is 37793824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27489049 + 15350724 = 5243^2 + 3918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42839773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42839273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21419886 + 21419887.

It is an arithmetic number, because the mean of its divisors is an integer number (21419887).

Almost surely, 2^42839773 is an apocalyptic number.

It is an amenable number.

42839773 is a deficient number, since it is larger than the sum of its proper divisors (1).

42839773 is an equidigital number, since it uses as much as digits as its factorization.

42839773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 42839773 is about 6545.2099278786. The cubic root of 42839773 is about 349.9041179533.

The spelling of 42839773 in words is "forty-two million, eight hundred thirty-nine thousand, seven hundred seventy-three".