673736945 has 32 divisors (see below), whose sum is σ = 983570688. Its totient is φ = 432488448.

The previous prime is 673736939. The next prime is 673736977. The reversal of 673736945 is 549637376.

It is a happy number.

It is not a de Polignac number, because 673736945 - 2¹⁰ = 673735921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673736893 and 673736902.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111902 + ... + 117768.

It is an arithmetic number, because the mean of its divisors is an integer number (30736584).

Almost surely, 2^673736945 is an apocalyptic number.

It is an amenable number.

673736945 is a deficient number, since it is larger than the sum of its proper divisors (309833743).

673736945 is a wasteful number, since it uses less digits than its factorization.

673736945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089.

The product of its digits is 2857680, while the sum is 50.

The square root of 673736945 is about 25956.4432270679. The cubic root of 673736945 is about 876.6578398073.

The spelling of 673736945 in words is "six hundred seventy-three million, seven hundred thirty-six thousand, nine hundred forty-five".