673526281 has 8 divisors (see below), whose sum is σ = 732420360. Its totient is φ = 616773888.

The previous prime is 673526267. The next prime is 673526297. The reversal of 673526281 is 182625376.

It can be written as a sum of positive squares in 4 ways, for example, as 490844025 + 182682256 = 22155^2 + 13516^2 .

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 673526281 - 2⁷ = 673526153 is a prime.

It is a super-2 number, since 2×673526281² = 907275302395381922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (673526221) 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, 534766 + ... + 536023.

It is an arithmetic number, because the mean of its divisors is an integer number (91552545).

Almost surely, 2^673526281 is an apocalyptic number.

It is an amenable number.

673526281 is a deficient number, since it is larger than the sum of its proper divisors (58894079).

673526281 is a wasteful number, since it uses less digits than its factorization.

673526281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070843.

The product of its digits is 120960, while the sum is 40.

The square root of 673526281 is about 25952.3848807773. The cubic root of 673526281 is about 876.5664591874.

The spelling of 673526281 in words is "six hundred seventy-three million, five hundred twenty-six thousand, two hundred eighty-one".