203991067 has 12 divisors (see below), whose sum is σ = 244952256. Its totient is φ = 169207920.

The previous prime is 203991037. The next prime is 203991079. The reversal of 203991067 is 760199302.

It is not a de Polignac number, because 203991067 - 2¹⁹ = 203466779 is a prime.

It is a super-2 number, since 2×203991067² = 83224710831596978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203991037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65628 + ... + 68665.

It is an arithmetic number, because the mean of its divisors is an integer number (20412688).

Almost surely, 2^203991067 is an apocalyptic number.

203991067 is a deficient number, since it is larger than the sum of its proper divisors (40961189).

203991067 is a wasteful number, since it uses less digits than its factorization.

203991067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134338 (or 134331 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 203991067 is about 14282.5441361124. The cubic root of 203991067 is about 588.6679390017.

The spelling of 203991067 in words is "two hundred three million, nine hundred ninety-one thousand, sixty-seven".