673737388731 has 12 divisors (see below), whose sum is σ = 1061646794520. Its totient is φ = 408325690080.

The previous prime is 673737388703. The next prime is 673737388739. The reversal of 673737388731 is 137883737376.

It is a happy number.

It is not a de Polignac number, because 673737388731 - 2⁵ = 673737388699 is a prime.

It is a super-2 number, since 2×673737388731² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (673737388739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3402713986 + ... + 3402714183.

It is an arithmetic number, because the mean of its divisors is an integer number (88470566210).

Almost surely, 2^673737388731 is an apocalyptic number.

673737388731 is a deficient number, since it is larger than the sum of its proper divisors (387909405789).

673737388731 is a wasteful number, since it uses less digits than its factorization.

673737388731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6805428186 (or 6805428183 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 63.

The spelling of 673737388731 in words is "six hundred seventy-three billion, seven hundred thirty-seven million, three hundred eighty-eight thousand, seven hundred thirty-one".