673377281 has 2 divisors, whose sum is σ = 673377282. Its totient is φ = 673377280.

The previous prime is 673377253. The next prime is 673377343. The reversal of 673377281 is 182773376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673143025 + 234256 = 25945^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 673377281 - 2⁶ = 673377217 is a prime.

It is a super-2 number, since 2×673377281² = 906873925133905922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (673377181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336688640 + 336688641.

It is an arithmetic number, because the mean of its divisors is an integer number (336688641).

Almost surely, 2^673377281 is an apocalyptic number.

It is an amenable number.

673377281 is a deficient number, since it is larger than the sum of its proper divisors (1).

673377281 is an equidigital number, since it uses as much as digits as its factorization.

673377281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 44.

The square root of 673377281 is about 25949.5140802289. The cubic root of 673377281 is about 876.5018153180.

The spelling of 673377281 in words is "six hundred seventy-three million, three hundred seventy-seven thousand, two hundred eighty-one".