673450981 has 8 divisors (see below), whose sum is σ = 770665280. Its totient is φ = 576488448.

The previous prime is 673450951. The next prime is 673450997. The reversal of 673450981 is 189054376.

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 673450981 - 2²¹ = 671353829 is a prime.

It is a super-2 number, since 2×673450981² = 907072447619724722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673450951) 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, 57171 + ... + 67936.

It is an arithmetic number, because the mean of its divisors is an integer number (96333160).

Almost surely, 2^673450981 is an apocalyptic number.

It is an amenable number.

673450981 is a deficient number, since it is larger than the sum of its proper divisors (97214299).

673450981 is a wasteful number, since it uses less digits than its factorization.

673450981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125883.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 673450981 is about 25950.9341065018. The cubic root of 673450981 is about 876.5337913632.

The spelling of 673450981 in words is "six hundred seventy-three million, four hundred fifty thousand, nine hundred eighty-one".