42074789 has 2 divisors, whose sum is σ = 42074790. Its totient is φ = 42074788.

The previous prime is 42074777. The next prime is 42074803. The reversal of 42074789 is 98747024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29789764 + 12285025 = 5458^2 + 3505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42074789 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42074089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21037394 + 21037395.

It is an arithmetic number, because the mean of its divisors is an integer number (21037395).

Almost surely, 2^42074789 is an apocalyptic number.

It is an amenable number.

42074789 is a deficient number, since it is larger than the sum of its proper divisors (1).

42074789 is an equidigital number, since it uses as much as digits as its factorization.

42074789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 42074789 is about 6486.5082286235. The cubic root of 42074789 is about 347.8088663945.

The spelling of 42074789 in words is "forty-two million, seventy-four thousand, seven hundred eighty-nine".