673415845 has 8 divisors (see below), whose sum is σ = 809171064. Its totient is φ = 538017984.

The previous prime is 673415839. The next prime is 673415863. The reversal of 673415845 is 548514376.

It can be written as a sum of positive squares in 4 ways, for example, as 287607681 + 385808164 = 16959^2 + 19642^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 673415845 - 2³ = 673415837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85174 + ... + 92743.

It is an arithmetic number, because the mean of its divisors is an integer number (101146383).

Almost surely, 2^673415845 is an apocalyptic number.

It is an amenable number.

673415845 is a deficient number, since it is larger than the sum of its proper divisors (135755219).

673415845 is a wasteful number, since it uses less digits than its factorization.

673415845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178679.

The product of its digits is 403200, while the sum is 43.

The square root of 673415845 is about 25950.2571278205. The cubic root of 673415845 is about 876.5185472807.

The spelling of 673415845 in words is "six hundred seventy-three million, four hundred fifteen thousand, eight hundred forty-five".