673728829 has 2 divisors, whose sum is σ = 673728830. Its totient is φ = 673728828.

The previous prime is 673728799. The next prime is 673728889. The reversal of 673728829 is 928827376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513022500 + 160706329 = 22650^2 + 12677^2 .

It is a cyclic number.

It is not a de Polignac number, because 673728829 - 2⁷ = 673728701 is a prime.

It is a super-2 number, since 2×673728829² = 907821070051422482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673728889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336864414 + 336864415.

It is an arithmetic number, because the mean of its divisors is an integer number (336864415).

Almost surely, 2^673728829 is an apocalyptic number.

It is an amenable number.

673728829 is a deficient number, since it is larger than the sum of its proper divisors (1).

673728829 is an equidigital number, since it uses as much as digits as its factorization.

673728829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 673728829 is about 25956.2868877657. The cubic root of 673728829 is about 876.6543196482.

The spelling of 673728829 in words is "six hundred seventy-three million, seven hundred twenty-eight thousand, eight hundred twenty-nine".