42647813 has 8 divisors (see below), whose sum is σ = 46017888. Its totient is φ = 39290544.

The previous prime is 42647797. The next prime is 42647827. The reversal of 42647813 is 31874624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42647813 - 2⁴ = 42647797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42647863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4406 + ... + 10232.

It is an arithmetic number, because the mean of its divisors is an integer number (5752236).

Almost surely, 2^42647813 is an apocalyptic number.

It is an amenable number.

42647813 is a deficient number, since it is larger than the sum of its proper divisors (3370075).

42647813 is a wasteful number, since it uses less digits than its factorization.

42647813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403.

The product of its digits is 32256, while the sum is 35.

The square root of 42647813 is about 6530.5293047348. The cubic root of 42647813 is about 349.3807089525.

The spelling of 42647813 in words is "forty-two million, six hundred forty-seven thousand, eight hundred thirteen".