42679289 has 2 divisors, whose sum is σ = 42679290. Its totient is φ = 42679288.

The previous prime is 42679261. The next prime is 42679297. The reversal of 42679289 is 98297624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23843689 + 18835600 = 4883^2 + 4340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42679289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42679249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21339644 + 21339645.

It is an arithmetic number, because the mean of its divisors is an integer number (21339645).

Almost surely, 2^42679289 is an apocalyptic number.

It is an amenable number.

42679289 is a deficient number, since it is larger than the sum of its proper divisors (1).

42679289 is an equidigital number, since it uses as much as digits as its factorization.

42679289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 42679289 is about 6532.9387720994. The cubic root of 42679289 is about 349.4666406965.

The spelling of 42679289 in words is "forty-two million, six hundred seventy-nine thousand, two hundred eighty-nine".