673400647 has 4 divisors (see below), whose sum is σ = 702678960. Its totient is φ = 644122336.

The previous prime is 673400639. The next prime is 673400659. The reversal of 673400647 is 746004376.

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 673400647 - 2³ = 673400639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673400047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14639122 + ... + 14639167.

It is an arithmetic number, because the mean of its divisors is an integer number (175669740).

Almost surely, 2^673400647 is an apocalyptic number.

673400647 is a deficient number, since it is larger than the sum of its proper divisors (29278313).

673400647 is a wasteful number, since it uses less digits than its factorization.

673400647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29278312.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 673400647 is about 25949.9642966999. The cubic root of 673400647 is about 876.5119533219.

The spelling of 673400647 in words is "six hundred seventy-three million, four hundred thousand, six hundred forty-seven".