673053581 has 4 divisors (see below), whose sum is σ = 689469564. Its totient is φ = 656637600.

The previous prime is 673053571. The next prime is 673053607. The reversal of 673053581 is 185350376.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80910025 + 592143556 = 8995^2 + 24334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-673053581 is a prime.

It is a super-2 number, since 2×673053581² = 906002245793847122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673053541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8207930 + ... + 8208011.

It is an arithmetic number, because the mean of its divisors is an integer number (172367391).

Almost surely, 2^673053581 is an apocalyptic number.

It is an amenable number.

673053581 is a deficient number, since it is larger than the sum of its proper divisors (16415983).

673053581 is a wasteful number, since it uses less digits than its factorization.

673053581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16415982.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 673053581 is about 25943.2762194754. The cubic root of 673053581 is about 876.3613447275.

The spelling of 673053581 in words is "six hundred seventy-three million, fifty-three thousand, five hundred eighty-one".