673657387 has 16 divisors (see below), whose sum is σ = 736120000. Its totient is φ = 612779904.

The previous prime is 673657381. The next prime is 673657421. The reversal of 673657387 is 783756376.

It is a happy number.

It is not a de Polignac number, because 673657387 - 2¹⁹ = 673133099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673657381) 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 15 ways as a sum of consecutive naturals, for example, 280789 + ... + 283177.

It is an arithmetic number, because the mean of its divisors is an integer number (46007500).

Almost surely, 2^673657387 is an apocalyptic number.

673657387 is a deficient number, since it is larger than the sum of its proper divisors (62462613).

673657387 is a wasteful number, since it uses less digits than its factorization.

673657387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710.

The product of its digits is 4445280, while the sum is 52.

The square root of 673657387 is about 25954.9106528996. The cubic root of 673657387 is about 876.6233318338.

The spelling of 673657387 in words is "six hundred seventy-three million, six hundred fifty-seven thousand, three hundred eighty-seven".