42609913 has 6 divisors (see below), whose sum is σ = 44970954. Its totient is φ = 40366944.

The previous prime is 42609911. The next prime is 42609929. The reversal of 42609913 is 31990624.

42609913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 23843689 + 18766224 = 4883^2 + 4332^2 .

It is not a de Polignac number, because 42609913 - 2¹ = 42609911 is a prime.

It is a super-3 number, since 3×42609913³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42609911) 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, 58656 + ... + 59377.

It is an arithmetic number, because the mean of its divisors is an integer number (7495159).

Almost surely, 2^42609913 is an apocalyptic number.

It is an amenable number.

42609913 is a deficient number, since it is larger than the sum of its proper divisors (2361041).

42609913 is a wasteful number, since it uses less digits than its factorization.

42609913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118071 (or 118052 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 42609913 is about 6527.6269041666. The cubic root of 42609913 is about 349.2771831025.

The spelling of 42609913 in words is "forty-two million, six hundred nine thousand, nine hundred thirteen".