673440629 has 4 divisors (see below), whose sum is σ = 680108460. Its totient is φ = 666772800.

The previous prime is 673440623. The next prime is 673440641. The reversal of 673440629 is 926044376.

673440629 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 316306225 + 357134404 = 17785^2 + 18898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673440629 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 (673440623) 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, 3333764 + ... + 3333965.

It is an arithmetic number, because the mean of its divisors is an integer number (170027115).

Almost surely, 2^673440629 is an apocalyptic number.

It is an amenable number.

673440629 is a deficient number, since it is larger than the sum of its proper divisors (6667831).

673440629 is a wasteful number, since it uses less digits than its factorization.

673440629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667830.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 673440629 is about 25950.7346524140. The cubic root of 673440629 is about 876.5293001062.

The spelling of 673440629 in words is "six hundred seventy-three million, four hundred forty thousand, six hundred twenty-nine".