673651361 has 16 divisors (see below), whose sum is σ = 699036240. Its totient is φ = 648760320.

The previous prime is 673651351. The next prime is 673651379. The reversal of 673651361 is 163156376.

It can be written as a sum of positive squares in 8 ways, for example, as 3876961 + 669774400 = 1969^2 + 25880^2 .

It is a cyclic number.

It is not a de Polignac number, because 673651361 - 2¹⁴ = 673634977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (673651351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1473845 + ... + 1474301.

It is an arithmetic number, because the mean of its divisors is an integer number (43689765).

Almost surely, 2^673651361 is an apocalyptic number.

It is an amenable number.

673651361 is a deficient number, since it is larger than the sum of its proper divisors (25384879).

673651361 is a wasteful number, since it uses less digits than its factorization.

673651361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884.

The product of its digits is 68040, while the sum is 38.

The square root of 673651361 is about 25954.7945667077. The cubic root of 673651361 is about 876.6207179690.

The spelling of 673651361 in words is "six hundred seventy-three million, six hundred fifty-one thousand, three hundred sixty-one".