42706109 has 2 divisors, whose sum is σ = 42706110. Its totient is φ = 42706108.

The previous prime is 42706087. The next prime is 42706117. The reversal of 42706109 is 90160724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36060025 + 6646084 = 6005^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 42706109 - 2²⁰ = 41657533 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 (42708109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21353054 + 21353055.

It is an arithmetic number, because the mean of its divisors is an integer number (21353055).

Almost surely, 2^42706109 is an apocalyptic number.

It is an amenable number.

42706109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42706109 is an equidigital number, since it uses as much as digits as its factorization.

42706109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 42706109 is about 6534.9911247071. The cubic root of 42706109 is about 349.5398278943.

The spelling of 42706109 in words is "forty-two million, seven hundred six thousand, one hundred nine".