202920005 has 8 divisors (see below), whose sum is σ = 244850424. Its totient is φ = 161438400.

The previous prime is 202920001. The next prime is 202920031. The reversal of 202920005 is 500029202.

It can be written as a sum of positive squares in 4 ways, for example, as 10764961 + 192155044 = 3281^2 + 13862^2 .

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

It is not a de Polignac number, because 202920005 - 2² = 202920001 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 (202920001) 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, 111206 + ... + 113015.

It is an arithmetic number, because the mean of its divisors is an integer number (30606303).

Almost surely, 2^202920005 is an apocalyptic number.

It is an amenable number.

202920005 is a deficient number, since it is larger than the sum of its proper divisors (41930419).

202920005 is a wasteful number, since it uses less digits than its factorization.

202920005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224407.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 202920005 is about 14244.9992979993. Note that the first 3 decimals coincide. The cubic root of 202920005 is about 587.6358569168.

Adding to 202920005 its sum of digits (20), we get a square (202920025 = 14245²).

Adding to 202920005 its reverse (500029202), we get a palindrome (702949207).

The spelling of 202920005 in words is "two hundred two million, nine hundred twenty thousand, five".