203491066 has 8 divisors (see below), whose sum is σ = 305301204. Its totient is φ = 101724000.

The previous prime is 203491039. The next prime is 203491069. The reversal of 203491066 is 660194302.

It can be written as a sum of positive squares in 2 ways, for example, as 203490225 + 841 = 14265^2 + 29^2 .

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

It is a super-2 number, since 2×203491066² = 82817227883632712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203491069) 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, 6736 + ... + 21268.

Almost surely, 2^203491066 is an apocalyptic number.

203491066 is a deficient number, since it is larger than the sum of its proper divisors (101810138).

203491066 is a wasteful number, since it uses less digits than its factorization.

203491066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21536.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 203491066 is about 14265.0294777123. The cubic root of 203491066 is about 588.1865856253.

The spelling of 203491066 in words is "two hundred three million, four hundred ninety-one thousand, sixty-six".