42089899 has 2 divisors, whose sum is σ = 42089900. Its totient is φ = 42089898.

The previous prime is 42089851. The next prime is 42089917. The reversal of 42089899 is 99898024.

It is a happy number.

42089899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42089899 - 2⁷ = 42089771 is a prime.

It is not a weakly prime, because it can be changed into another prime (42089809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21044949 + 21044950.

It is an arithmetic number, because the mean of its divisors is an integer number (21044950).

Almost surely, 2^42089899 is an apocalyptic number.

42089899 is a deficient number, since it is larger than the sum of its proper divisors (1).

42089899 is an equidigital number, since it uses as much as digits as its factorization.

42089899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 42089899 is about 6487.6728493351. The cubic root of 42089899 is about 347.8504967319.

The spelling of 42089899 in words is "forty-two million, eighty-nine thousand, eight hundred ninety-nine".