673432891 has 2 divisors, whose sum is σ = 673432892. Its totient is φ = 673432890.

The previous prime is 673432861. The next prime is 673432897. The reversal of 673432891 is 198234376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673432891 - 2⁹ = 673432379 is a prime.

It is not a weakly prime, because it can be changed into another prime (673432897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336716445 + 336716446.

It is an arithmetic number, because the mean of its divisors is an integer number (336716446).

Almost surely, 2^673432891 is an apocalyptic number.

673432891 is a deficient number, since it is larger than the sum of its proper divisors (1).

673432891 is an equidigital number, since it uses as much as digits as its factorization.

673432891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 673432891 is about 25950.5855617942. The cubic root of 673432891 is about 876.5259429136.

The spelling of 673432891 in words is "six hundred seventy-three million, four hundred thirty-two thousand, eight hundred ninety-one".