1673221173 has 24 divisors (see below), whose sum is σ = 2419008192. Its totient is φ = 1028297088.

The previous prime is 1673221169. The next prime is 1673221223. The reversal of 1673221173 is 3711223761.

It is not a de Polignac number, because 1673221173 - 2² = 1673221169 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673221163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 481440 + ... + 484902.

It is an arithmetic number, because the mean of its divisors is an integer number (100792008).

Almost surely, 2^1673221173 is an apocalyptic number.

1673221173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1673221173 is a deficient number, since it is larger than the sum of its proper divisors (745787019).

1673221173 is a wasteful number, since it uses less digits than its factorization.

1673221173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445 (or 4432 counting only the distinct ones).

The product of its digits is 10584, while the sum is 33.

The square root of 1673221173 is about 40905.0262559505. The cubic root of 1673221173 is about 1187.1833137872.

The spelling of 1673221173 in words is "one billion, six hundred seventy-three million, two hundred twenty-one thousand, one hundred seventy-three".