42636091 has 6 divisors (see below), whose sum is σ = 43652580. Its totient is φ = 41642748.

The previous prime is 42636079. The next prime is 42636109. The reversal of 42636091 is 19063624.

42636091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42636091 - 2¹³ = 42627899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42636001) 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 in 5 ways as a sum of consecutive naturals, for example, 9681 + ... + 13378.

It is an arithmetic number, because the mean of its divisors is an integer number (7275430).

Almost surely, 2^42636091 is an apocalyptic number.

42636091 is a deficient number, since it is larger than the sum of its proper divisors (1016489).

42636091 is an equidigital number, since it uses as much as digits as its factorization.

42636091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23145 (or 23102 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42636091 is about 6529.6317660340. The cubic root of 42636091 is about 349.3486962445.

The spelling of 42636091 in words is "forty-two million, six hundred thirty-six thousand, ninety-one".