673861686 has 64 divisors (see below), whose sum is σ = 1437224448. Its totient is φ = 210325248.

The previous prime is 673861681. The next prime is 673861709. The reversal of 673861686 is 686168376.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673861681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696375 + ... + 697341.

It is an arithmetic number, because the mean of its divisors is an integer number (22456632).

Almost surely, 2^673861686 is an apocalyptic number.

673861686 is an abundant number, since it is smaller than the sum of its proper divisors (763362762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

673861686 is a wasteful number, since it uses less digits than its factorization.

673861686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125.

The product of its digits is 1741824, while the sum is 51.

The square root of 673861686 is about 25958.8460067084. The cubic root of 673861686 is about 876.7119402630.

The spelling of 673861686 in words is "six hundred seventy-three million, eight hundred sixty-one thousand, six hundred eighty-six".