1609168903 has 4 divisors (see below), whose sum is σ = 1609621848. Its totient is φ = 1608715960.

The previous prime is 1609168829. The next prime is 1609168931. The reversal of 1609168903 is 3098619061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1609168903 - 2⁹ = 1609168391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1609168903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1609162903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221101 + ... + 228262.

It is an arithmetic number, because the mean of its divisors is an integer number (402405462).

Almost surely, 2^1609168903 is an apocalyptic number.

1609168903 is a deficient number, since it is larger than the sum of its proper divisors (452945).

1609168903 is an equidigital number, since it uses as much as digits as its factorization.

1609168903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452944.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 1609168903 is about 40114.4475594517. The cubic root of 1609168903 is about 1171.8370107204.

The spelling of 1609168903 in words is "one billion, six hundred nine million, one hundred sixty-eight thousand, nine hundred three".