42396813 has 12 divisors (see below), whose sum is σ = 61305660. Its totient is φ = 28234176.

The previous prime is 42396799. The next prime is 42396817. The reversal of 42396813 is 31869324.

42396813 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 2 ways, for example, as 28869129 + 13527684 = 5373^2 + 3678^2 .

It is not a de Polignac number, because 42396813 - 2¹⁶ = 42331277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42396817) 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 11 ways as a sum of consecutive naturals, for example, 9145 + ... + 12977.

It is an arithmetic number, because the mean of its divisors is an integer number (5108805).

Almost surely, 2^42396813 is an apocalyptic number.

It is an amenable number.

42396813 is a deficient number, since it is larger than the sum of its proper divisors (18908847).

42396813 is a wasteful number, since it uses less digits than its factorization.

42396813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068 (or 5065 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 42396813 is about 6511.2835140239. The cubic root of 42396813 is about 348.6939432775.

The spelling of 42396813 in words is "forty-two million, three hundred ninety-six thousand, eight hundred thirteen".