1663303173 has 8 divisors (see below), whose sum is σ = 2534557248. Its totient is φ = 950458944.

The previous prime is 1663303157. The next prime is 1663303189. The reversal of 1663303173 is 3713033661.

It is an interprime number because it is at equal distance from previous prime (1663303157) and next prime (1663303189).

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

It is not a de Polignac number, because 1663303173 - 2⁴ = 1663303157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663303973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39602436 + ... + 39602477.

It is an arithmetic number, because the mean of its divisors is an integer number (316819656).

Almost surely, 2^1663303173 is an apocalyptic number.

It is an amenable number.

1663303173 is a deficient number, since it is larger than the sum of its proper divisors (871254075).

1663303173 is an equidigital number, since it uses as much as digits as its factorization.

1663303173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79204923.

The product of its (nonzero) digits is 20412, while the sum is 33.

The square root of 1663303173 is about 40783.6140257334. The cubic root of 1663303173 is about 1184.8329918281.

The spelling of 1663303173 in words is "one billion, six hundred sixty-three million, three hundred three thousand, one hundred seventy-three".