673557869 has 2 divisors, whose sum is σ = 673557870. Its totient is φ = 673557868.

The previous prime is 673557851. The next prime is 673557889. The reversal of 673557869 is 968755376.

673557869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629508100 + 44049769 = 25090^2 + 6637^2 .

It is a cyclic number.

It is not a de Polignac number, because 673557869 - 2⁸ = 673557613 is a prime.

It is a super-2 number, since 2×673557869² = 907360405783642322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673557839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336778934 + 336778935.

It is an arithmetic number, because the mean of its divisors is an integer number (336778935).

Almost surely, 2^673557869 is an apocalyptic number.

It is an amenable number.

673557869 is a deficient number, since it is larger than the sum of its proper divisors (1).

673557869 is an equidigital number, since it uses as much as digits as its factorization.

673557869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 56.

The square root of 673557869 is about 25952.9934496967. The cubic root of 673557869 is about 876.5801624628.

The spelling of 673557869 in words is "six hundred seventy-three million, five hundred fifty-seven thousand, eight hundred sixty-nine".