42687313 has 4 divisors (see below), whose sum is σ = 43492788. Its totient is φ = 41881840.

The previous prime is 42687299. The next prime is 42687331. The reversal of 42687313 is 31378624.

It is a happy number.

42687313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19963024 + 22724289 = 4468^2 + 4767^2 .

It is a cyclic number.

It is not a de Polignac number, because 42687313 - 2⁹ = 42686801 is a prime.

It is a super-3 number, since 3×42687313³ (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 (42687353) 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 3 ways as a sum of consecutive naturals, for example, 402658 + ... + 402763.

It is an arithmetic number, because the mean of its divisors is an integer number (10873197).

Almost surely, 2^42687313 is an apocalyptic number.

It is an amenable number.

42687313 is a deficient number, since it is larger than the sum of its proper divisors (805475).

42687313 is an equidigital number, since it uses as much as digits as its factorization.

42687313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805474.

The product of its digits is 24192, while the sum is 34.

The square root of 42687313 is about 6533.5528619580. The cubic root of 42687313 is about 349.4885400352.

The spelling of 42687313 in words is "forty-two million, six hundred eighty-seven thousand, three hundred thirteen".