203120409 has 8 divisors (see below), whose sum is σ = 270943360. Its totient is φ = 135355536.

The previous prime is 203120381. The next prime is 203120413. The reversal of 203120409 is 904021302.

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

It is not a de Polignac number, because 203120409 - 2¹¹ = 203118361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203120459) 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, 5569 + ... + 20910.

It is an arithmetic number, because the mean of its divisors is an integer number (33867920).

Almost surely, 2^203120409 is an apocalyptic number.

It is an amenable number.

203120409 is a deficient number, since it is larger than the sum of its proper divisors (67822951).

203120409 is a wasteful number, since it uses less digits than its factorization.

203120409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29039.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 203120409 is about 14252.0317498945. The cubic root of 203120409 is about 587.8292431881.

The spelling of 203120409 in words is "two hundred three million, one hundred twenty thousand, four hundred nine".