42626813 has 4 divisors (see below), whose sum is σ = 42741468. Its totient is φ = 42512160.

The previous prime is 42626809. The next prime is 42626819. The reversal of 42626813 is 31862624.

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 24970009 + 17656804 = 4997^2 + 4202^2 .

It is a cyclic number.

It is not a de Polignac number, because 42626813 - 2² = 42626809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42626813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42626819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56768 + ... + 57513.

It is an arithmetic number, because the mean of its divisors is an integer number (10685367).

Almost surely, 2^42626813 is an apocalyptic number.

It is an amenable number.

42626813 is a deficient number, since it is larger than the sum of its proper divisors (114655).

42626813 is a wasteful number, since it uses less digits than its factorization.

42626813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114654.

The product of its digits is 13824, while the sum is 32.

The square root of 42626813 is about 6528.9212738400. The cubic root of 42626813 is about 349.3233539249.

The spelling of 42626813 in words is "forty-two million, six hundred twenty-six thousand, eight hundred thirteen".