1673513305 has 4 divisors (see below), whose sum is σ = 2008215972. Its totient is φ = 1338810640.

The previous prime is 1673513279. The next prime is 1673513321. The reversal of 1673513305 is 5033153761.

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

It can be written as a sum of positive squares in 2 ways, for example, as 593799424 + 1079713881 = 24368^2 + 32859^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1673513305 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 167351326 + ... + 167351335.

It is an arithmetic number, because the mean of its divisors is an integer number (502053993).

Almost surely, 2^1673513305 is an apocalyptic number.

It is an amenable number.

1673513305 is a deficient number, since it is larger than the sum of its proper divisors (334702667).

1673513305 is an equidigital number, since it uses as much as digits as its factorization.

1673513305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334702666.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 1673513305 is about 40908.5969571189. The cubic root of 1673513305 is about 1187.2524008988.

The spelling of 1673513305 in words is "one billion, six hundred seventy-three million, five hundred thirteen thousand, three hundred five".