673704905 has 8 divisors (see below), whose sum is σ = 808647432. Its totient is φ = 538829568.

The previous prime is 673704881. The next prime is 673704919. The reversal of 673704905 is 509407376.

It can be written as a sum of positive squares in 4 ways, for example, as 9560464 + 664144441 = 3092^2 + 25771^2 .

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 673704905 - 2⁸ = 673704649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8819 + ... + 37751.

It is an arithmetic number, because the mean of its divisors is an integer number (101080929).

Almost surely, 2^673704905 is an apocalyptic number.

It is an amenable number.

673704905 is a deficient number, since it is larger than the sum of its proper divisors (134942527).

673704905 is a wasteful number, since it uses less digits than its factorization.

673704905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33595.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 673704905 is about 25955.8260319336. The cubic root of 673704905 is about 876.6439429085.

The spelling of 673704905 in words is "six hundred seventy-three million, seven hundred four thousand, nine hundred five".