42819757 has 2 divisors, whose sum is σ = 42819758. Its totient is φ = 42819756.

The previous prime is 42819739. The next prime is 42819797. The reversal of 42819757 is 75791824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38180041 + 4639716 = 6179^2 + 2154^2 .

It is a cyclic number.

It is not a de Polignac number, because 42819757 - 2¹⁹ = 42295469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42819797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21409878 + 21409879.

It is an arithmetic number, because the mean of its divisors is an integer number (21409879).

Almost surely, 2^42819757 is an apocalyptic number.

It is an amenable number.

42819757 is a deficient number, since it is larger than the sum of its proper divisors (1).

42819757 is an equidigital number, since it uses as much as digits as its factorization.

42819757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 42819757 is about 6543.6806920876. The cubic root of 42819757 is about 349.8496143041.

The spelling of 42819757 in words is "forty-two million, eight hundred nineteen thousand, seven hundred fifty-seven".