202438813 has 4 divisors (see below), whose sum is σ = 202561920. Its totient is φ = 202315708.

The previous prime is 202438807. The next prime is 202438829. The reversal of 202438813 is 318834202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202438813 - 2⁵ = 202438781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202438213) 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, 59053 + ... + 62386.

It is an arithmetic number, because the mean of its divisors is an integer number (50640480).

Almost surely, 2^202438813 is an apocalyptic number.

It is an amenable number.

202438813 is a deficient number, since it is larger than the sum of its proper divisors (123107).

202438813 is a wasteful number, since it uses less digits than its factorization.

202438813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123106.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 202438813 is about 14228.0994162959. The cubic root of 202438813 is about 587.1709947836.

The spelling of 202438813 in words is "two hundred two million, four hundred thirty-eight thousand, eight hundred thirteen".