42708091 has 2 divisors, whose sum is σ = 42708092. Its totient is φ = 42708090.

The previous prime is 42708077. The next prime is 42708103. The reversal of 42708091 is 19080724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42708091 - 2⁵ = 42708059 is a prime.

It is a Chen prime.

It is equal to p_2588017 and since 42708091 and 2588017 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42708031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21354045 + 21354046.

It is an arithmetic number, because the mean of its divisors is an integer number (21354046).

Almost surely, 2^42708091 is an apocalyptic number.

42708091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42708091 is an equidigital number, since it uses as much as digits as its factorization.

42708091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 42708091 is about 6535.1427681421. The cubic root of 42708091 is about 349.5452352177.

The spelling of 42708091 in words is "forty-two million, seven hundred eight thousand, ninety-one".