673656443 has 4 divisors (see below), whose sum is σ = 695387328. Its totient is φ = 651925560.

The previous prime is 673656439. The next prime is 673656481. The reversal of 673656443 is 344656376.

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

It is a cyclic number.

It is not a de Polignac number, because 673656443 - 2² = 673656439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 673656394 and 673656403.

It is not an unprimeable number, because it can be changed into a prime (673656413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10865396 + ... + 10865457.

It is an arithmetic number, because the mean of its divisors is an integer number (173846832).

Almost surely, 2^673656443 is an apocalyptic number.

673656443 is a deficient number, since it is larger than the sum of its proper divisors (21730885).

673656443 is a wasteful number, since it uses less digits than its factorization.

673656443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21730884.

The product of its digits is 1088640, while the sum is 44.

The square root of 673656443 is about 25954.8924675099. The cubic root of 673656443 is about 876.6229223612.

The spelling of 673656443 in words is "six hundred seventy-three million, six hundred fifty-six thousand, four hundred forty-three".