42608779 has 2 divisors, whose sum is σ = 42608780. Its totient is φ = 42608778.

The previous prime is 42608777. The next prime is 42608807. The reversal of 42608779 is 97780624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42608779 - 2¹ = 42608777 is a prime.

Together with 42608777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42608777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21304389 + 21304390.

It is an arithmetic number, because the mean of its divisors is an integer number (21304390).

Almost surely, 2^42608779 is an apocalyptic number.

42608779 is a deficient number, since it is larger than the sum of its proper divisors (1).

42608779 is an equidigital number, since it uses as much as digits as its factorization.

42608779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 42608779 is about 6527.5400420066. The cubic root of 42608779 is about 349.2740845759.

The spelling of 42608779 in words is "forty-two million, six hundred eight thousand, seven hundred seventy-nine".