42808039 has 2 divisors, whose sum is σ = 42808040. Its totient is φ = 42808038.

The previous prime is 42808033. The next prime is 42808043. The reversal of 42808039 is 93080824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42808039 - 2⁷ = 42807911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42807995 and 42808013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42808033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21404019 + 21404020.

It is an arithmetic number, because the mean of its divisors is an integer number (21404020).

Almost surely, 2^42808039 is an apocalyptic number.

42808039 is a deficient number, since it is larger than the sum of its proper divisors (1).

42808039 is an equidigital number, since it uses as much as digits as its factorization.

42808039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 42808039 is about 6542.7852631735. The cubic root of 42808039 is about 349.8176982597.

The spelling of 42808039 in words is "forty-two million, eight hundred eight thousand, thirty-nine".