673996891 has 2 divisors, whose sum is σ = 673996892. Its totient is φ = 673996890.

The previous prime is 673996871. The next prime is 673996903. The reversal of 673996891 is 198699376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 673996891 - 2¹¹ = 673994843 is a prime.

It is a super-3 number, since 3×673996891³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673996811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336998445 + 336998446.

It is an arithmetic number, because the mean of its divisors is an integer number (336998446).

Almost surely, 2^673996891 is an apocalyptic number.

673996891 is a deficient number, since it is larger than the sum of its proper divisors (1).

673996891 is an equidigital number, since it uses as much as digits as its factorization.

673996891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 58.

The square root of 673996891 is about 25961.4500943225. The cubic root of 673996891 is about 876.7705714399.

The spelling of 673996891 in words is "six hundred seventy-three million, nine hundred ninety-six thousand, eight hundred ninety-one".