42716209 has 2 divisors, whose sum is σ = 42716210. Its totient is φ = 42716208.

The previous prime is 42716207. The next prime is 42716213. The reversal of 42716209 is 90261724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31640625 + 11075584 = 5625^2 + 3328^2 .

It is a cyclic number.

It is not a de Polignac number, because 42716209 - 2¹ = 42716207 is a prime.

It is a super-3 number, since 3×42716209³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 42716207, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42716207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21358104 + 21358105.

It is an arithmetic number, because the mean of its divisors is an integer number (21358105).

Almost surely, 2^42716209 is an apocalyptic number.

It is an amenable number.

42716209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42716209 is an equidigital number, since it uses as much as digits as its factorization.

42716209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 42716209 is about 6535.7638421228. The cubic root of 42716209 is about 349.5673811263.

The spelling of 42716209 in words is "forty-two million, seven hundred sixteen thousand, two hundred nine".