673287639 has 4 divisors (see below), whose sum is σ = 897716856. Its totient is φ = 448858424.

The previous prime is 673287611. The next prime is 673287647. The reversal of 673287639 is 936782376.

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 673287639 - 2⁵ = 673287607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 673287591 and 673287600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673287649) 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, 112214604 + ... + 112214609.

It is an arithmetic number, because the mean of its divisors is an integer number (224429214).

Almost surely, 2^673287639 is an apocalyptic number.

673287639 is a deficient number, since it is larger than the sum of its proper divisors (224429217).

673287639 is a wasteful number, since it uses less digits than its factorization.

673287639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224429216.

The product of its digits is 2286144, while the sum is 51.

The square root of 673287639 is about 25947.7867842327. The cubic root of 673287639 is about 876.4629194099.

The spelling of 673287639 in words is "six hundred seventy-three million, two hundred eighty-seven thousand, six hundred thirty-nine".