42046709 has 2 divisors, whose sum is σ = 42046710. Its totient is φ = 42046708.

The previous prime is 42046679. The next prime is 42046747. The reversal of 42046709 is 90764024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 8151025 = 5822^2 + 2855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42046709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42046769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21023354 + 21023355.

It is an arithmetic number, because the mean of its divisors is an integer number (21023355).

Almost surely, 2^42046709 is an apocalyptic number.

It is an amenable number.

42046709 is a deficient number, since it is larger than the sum of its proper divisors (1).

42046709 is an equidigital number, since it uses as much as digits as its factorization.

42046709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 42046709 is about 6484.3433746217. The cubic root of 42046709 is about 347.7314752642.

The spelling of 42046709 in words is "forty-two million, forty-six thousand, seven hundred nine".