42613209 has 24 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 27424656.

The previous prime is 42613201. The next prime is 42613211. The reversal of 42613209 is 90231624.

42613209 is a `hidden beast` number, since 42 + 613 + 2 + 0 + 9 = 666.

42613209 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 42613209 - 2³ = 42613201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42613201) 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 23 ways as a sum of consecutive naturals, for example, 4024 + ... + 10070.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^42613209 is an apocalyptic number.

It is an amenable number.

42613209 is a deficient number, since it is larger than the sum of its proper divisors (23430951).

42613209 is an equidigital number, since it uses as much as digits as its factorization.

42613209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091 (or 6079 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 42613209 is about 6527.8793646942. The cubic root of 42613209 is about 349.2861887370.

The spelling of 42613209 in words is "forty-two million, six hundred thirteen thousand, two hundred nine".