1989294163 has 4 divisors (see below), whose sum is σ = 1989897928. Its totient is φ = 1988690400.

The previous prime is 1989294157. The next prime is 1989294169. The reversal of 1989294163 is 3614929891.

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

It is an interprime number because it is at equal distance from previous prime (1989294157) and next prime (1989294169).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1989294163 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 1989294163.

It is not an unprimeable number, because it can be changed into a prime (1989294169) 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, 296913 + ... + 303538.

It is an arithmetic number, because the mean of its divisors is an integer number (497474482).

Almost surely, 2^1989294163 is an apocalyptic number.

1989294163 is a deficient number, since it is larger than the sum of its proper divisors (603765).

1989294163 is an equidigital number, since it uses as much as digits as its factorization.

1989294163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603764.

The product of its digits is 839808, while the sum is 52.

The square root of 1989294163 is about 44601.5040441463. The cubic root of 1989294163 is about 1257.6689417527.

The spelling of 1989294163 in words is "one billion, nine hundred eighty-nine million, two hundred ninety-four thousand, one hundred sixty-three".