673734681 has 12 divisors (see below), whose sum is σ = 978114852. Its totient is φ = 446875296.

The previous prime is 673734679. The next prime is 673734683. The reversal of 673734681 is 186437376.

It is an interprime number because it is at equal distance from previous prime (673734679) and next prime (673734683).

It can be written as a sum of positive squares in 2 ways, for example, as 565678656 + 108056025 = 23784^2 + 10395^2 .

It is not a de Polignac number, because 673734681 - 2¹ = 673734679 is a prime.

It is a super-2 number, since 2×673734681² = 907836840764343522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (673734683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188226 + ... + 191771.

It is an arithmetic number, because the mean of its divisors is an integer number (81509571).

Almost surely, 2^673734681 is an apocalyptic number.

It is an amenable number.

673734681 is a deficient number, since it is larger than the sum of its proper divisors (304380171).

673734681 is a wasteful number, since it uses less digits than its factorization.

673734681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380200 (or 380197 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 673734681 is about 25956.3996155091. The cubic root of 673734681 is about 876.6568578436.

The spelling of 673734681 in words is "six hundred seventy-three million, seven hundred thirty-four thousand, six hundred eighty-one".