42080879 has 2 divisors, whose sum is σ = 42080880. Its totient is φ = 42080878.

The previous prime is 42080849. The next prime is 42080881. The reversal of 42080879 is 97808024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42080879 is a prime.

Together with 42080881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42080849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21040439 + 21040440.

It is an arithmetic number, because the mean of its divisors is an integer number (21040440).

Almost surely, 2^42080879 is an apocalyptic number.

42080879 is a deficient number, since it is larger than the sum of its proper divisors (1).

42080879 is an equidigital number, since it uses as much as digits as its factorization.

42080879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 42080879 is about 6486.9776475644. The cubic root of 42080879 is about 347.8256464652.

The spelling of 42080879 in words is "forty-two million, eighty thousand, eight hundred seventy-nine".