673704991 has 8 divisors (see below), whose sum is σ = 699690960. Its totient is φ = 648128448.

The previous prime is 673704959. The next prime is 673705001. The reversal of 673704991 is 199407376.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 673704991 - 2⁵ = 673704959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673704931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99001 + ... + 105586.

It is an arithmetic number, because the mean of its divisors is an integer number (87461370).

Almost surely, 2^673704991 is an apocalyptic number.

673704991 is a deficient number, since it is larger than the sum of its proper divisors (25985969).

673704991 is a wasteful number, since it uses less digits than its factorization.

673704991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204713.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 673704991 is about 25955.8276885943. The cubic root of 673704991 is about 876.6439802104.

It can be divided in two parts, 67370 and 4991, that added together give a square (72361 = 269²).

The spelling of 673704991 in words is "six hundred seventy-three million, seven hundred four thousand, nine hundred ninety-one".