42775829 has 2 divisors, whose sum is σ = 42775830. Its totient is φ = 42775828.

The previous prime is 42775801. The next prime is 42775849. The reversal of 42775829 is 92857724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 3713329 = 6250^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 42775829 - 2¹⁶ = 42710293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42775829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42775849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387914 + 21387915.

It is an arithmetic number, because the mean of its divisors is an integer number (21387915).

Almost surely, 2^42775829 is an apocalyptic number.

It is an amenable number.

42775829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42775829 is an equidigital number, since it uses as much as digits as its factorization.

42775829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 42775829 is about 6540.3233100513. The cubic root of 42775829 is about 349.7299386119.

The spelling of 42775829 in words is "forty-two million, seven hundred seventy-five thousand, eight hundred twenty-nine".