1673821799 has 32 divisors (see below), whose sum is σ = 1899240000. Its totient is φ = 1473593472.

The previous prime is 1673821771. The next prime is 1673821811. The reversal of 1673821799 is 9971283761.

It is not a de Polignac number, because 1673821799 - 2⁸ = 1673821543 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 1673821799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673821759) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4795877 + ... + 4796225.

It is an arithmetic number, because the mean of its divisors is an integer number (59351250).

Almost surely, 2^1673821799 is an apocalyptic number.

1673821799 is a deficient number, since it is larger than the sum of its proper divisors (225418201).

1673821799 is an equidigital number, since it uses as much as digits as its factorization.

1673821799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 458 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 53.

The square root of 1673821799 is about 40912.3673111200. The cubic root of 1673821799 is about 1187.3253487780.

The spelling of 1673821799 in words is "one billion, six hundred seventy-three million, eight hundred twenty-one thousand, seven hundred ninety-nine".