673428487 has 4 divisors (see below), whose sum is σ = 679606840. Its totient is φ = 667250136.

The previous prime is 673428479. The next prime is 673428491. The reversal of 673428487 is 784824376.

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 673428487 - 2³ = 673428479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 673428487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673428787) 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, 3089013 + ... + 3089230.

It is an arithmetic number, because the mean of its divisors is an integer number (169901710).

Almost surely, 2^673428487 is an apocalyptic number.

673428487 is a deficient number, since it is larger than the sum of its proper divisors (6178353).

673428487 is a wasteful number, since it uses less digits than its factorization.

673428487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178352.

The product of its digits is 1806336, while the sum is 49.

The square root of 673428487 is about 25950.5007080788. The cubic root of 673428487 is about 876.5240321918.

The spelling of 673428487 in words is "six hundred seventy-three million, four hundred twenty-eight thousand, four hundred eighty-seven".