673416823 has 2 divisors, whose sum is σ = 673416824. Its totient is φ = 673416822.

The previous prime is 673416797. The next prime is 673416853. The reversal of 673416823 is 328614376.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673416823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673416853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336708411 + 336708412.

It is an arithmetic number, because the mean of its divisors is an integer number (336708412).

Almost surely, 2^673416823 is an apocalyptic number.

673416823 is a deficient number, since it is larger than the sum of its proper divisors (1).

673416823 is an equidigital number, since it uses as much as digits as its factorization.

673416823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 673416823 is about 25950.2759715576. The cubic root of 673416823 is about 876.5189716024.

The spelling of 673416823 in words is "six hundred seventy-three million, four hundred sixteen thousand, eight hundred twenty-three".