673456729 has 8 divisors (see below), whose sum is σ = 773347680. Its totient is φ = 580010400.

The previous prime is 673456703. The next prime is 673456733. The reversal of 673456729 is 927654376.

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 673456729 - 2⁷ = 673456601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673456759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1610932 + ... + 1611349.

It is an arithmetic number, because the mean of its divisors is an integer number (96668460).

Almost surely, 2^673456729 is an apocalyptic number.

It is an amenable number.

673456729 is a deficient number, since it is larger than the sum of its proper divisors (99890951).

673456729 is a wasteful number, since it uses less digits than its factorization.

673456729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222311.

The product of its digits is 1905120, while the sum is 49.

The square root of 673456729 is about 25951.0448537241. The cubic root of 673456729 is about 876.5362851363.

The spelling of 673456729 in words is "six hundred seventy-three million, four hundred fifty-six thousand, seven hundred twenty-nine".