42035909 has 2 divisors, whose sum is σ = 42035910. Its totient is φ = 42035908.

The previous prime is 42035899. The next prime is 42035911. The reversal of 42035909 is 90953024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34456900 + 7579009 = 5870^2 + 2753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42035909 is a prime.

Together with 42035911, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2549651 and since 42035909 and 2549651 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42035989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21017954 + 21017955.

It is an arithmetic number, because the mean of its divisors is an integer number (21017955).

Almost surely, 2^42035909 is an apocalyptic number.

It is an amenable number.

42035909 is a deficient number, since it is larger than the sum of its proper divisors (1).

42035909 is an equidigital number, since it uses as much as digits as its factorization.

42035909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 42035909 is about 6483.5105459928. The cubic root of 42035909 is about 347.7017002702.

The spelling of 42035909 in words is "forty-two million, thirty-five thousand, nine hundred nine".