42273109 has 2 divisors, whose sum is σ = 42273110. Its totient is φ = 42273108.

The previous prime is 42273083. The next prime is 42273113. The reversal of 42273109 is 90137224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 20277009 = 4690^2 + 4503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42273109 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 (42273139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21136554 + 21136555.

It is an arithmetic number, because the mean of its divisors is an integer number (21136555).

Almost surely, 2^42273109 is an apocalyptic number.

It is an amenable number.

42273109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42273109 is an equidigital number, since it uses as much as digits as its factorization.

42273109 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 28.

The square root of 42273109 is about 6501.7773723806. Note that the first 3 decimals coincide. The cubic root of 42273109 is about 348.3544770684.

The spelling of 42273109 in words is "forty-two million, two hundred seventy-three thousand, one hundred nine".