203020973 has 4 divisors (see below), whose sum is σ = 203051100. Its totient is φ = 202990848.

The previous prime is 203020949. The next prime is 203020991. The reversal of 203020973 is 379020302.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 379020302 = 2 ⋅189510151.

It can be written as a sum of positive squares in 2 ways, for example, as 72216004 + 130804969 = 8498^2 + 11437^2 .

It is a cyclic number.

It is not a de Polignac number, because 203020973 - 2¹⁴ = 203004589 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 (203020943) 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, 203 + ... + 20151.

It is an arithmetic number, because the mean of its divisors is an integer number (50762775).

Almost surely, 2^203020973 is an apocalyptic number.

It is an amenable number.

203020973 is a deficient number, since it is larger than the sum of its proper divisors (30127).

203020973 is a wasteful number, since it uses less digits than its factorization.

203020973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30126.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 203020973 is about 14248.5428377782. The cubic root of 203020973 is about 587.7333051356.

The spelling of 203020973 in words is "two hundred three million, twenty thousand, nine hundred seventy-three".