203148009 has 9 divisors (see below), whose sum is σ = 293497789. Its totient is φ = 135403500.

The previous prime is 203148007. The next prime is 203148037. The reversal of 203148009 is 900841302.

The square root of 203148009 is 14253.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 203148009 - 2¹ = 203148007 is a prime.

It is a super-2 number, since 2×203148009² = 82538227121328162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203148007) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 40384 + ... + 45134.

Almost surely, 2^203148009 is an apocalyptic number.

203148009 is the 14253-rd square number.

203148009 is the 7127-th centered octagonal number.

It is an amenable number.

203148009 is a deficient number, since it is larger than the sum of its proper divisors (90349780).

203148009 is an frugal number, since it uses more digits than its factorization.

203148009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9508 (or 4754 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The cubic root of 203148009 is about 587.8558667270.

The spelling of 203148009 in words is "two hundred three million, one hundred forty-eight thousand, nine".