202342809 has 4 divisors (see below), whose sum is σ = 269790416. Its totient is φ = 134895204.

The previous prime is 202342807. The next prime is 202342813. The reversal of 202342809 is 908243202.

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 not a de Polignac number, because 202342809 - 2¹ = 202342807 is a prime.

It is a super-2 number, since 2×202342809² = 81885224708020962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202342807) 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, 33723799 + ... + 33723804.

It is an arithmetic number, because the mean of its divisors is an integer number (67447604).

Almost surely, 2^202342809 is an apocalyptic number.

It is an amenable number.

202342809 is a deficient number, since it is larger than the sum of its proper divisors (67447607).

202342809 is an equidigital number, since it uses as much as digits as its factorization.

202342809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67447606.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 202342809 is about 14224.7252697548. The cubic root of 202342809 is about 587.0781606794.

The spelling of 202342809 in words is "two hundred two million, three hundred forty-two thousand, eight hundred nine".