675581 has 2 divisors, whose sum is σ = 675582. Its totient is φ = 675580.

The previous prime is 675569. The next prime is 675593. The reversal of 675581 is 185576.

It is a balanced prime because it is at equal distance from previous prime (675569) and next prime (675593).

It can be written as a sum of positive squares in only one way, i.e., 648025 + 27556 = 805^2 + 166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675581 is a prime.

It is a super-2 number, since 2×675581² = 912819375122, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 675581.

It is not a weakly prime, because it can be changed into another prime (675511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337790 + 337791.

It is an arithmetic number, because the mean of its divisors is an integer number (337791).

2⁶⁷⁵⁵⁸¹ is an apocalyptic number.

It is an amenable number.

675581 is a deficient number, since it is larger than the sum of its proper divisors (1).

675581 is an equidigital number, since it uses as much as digits as its factorization.

675581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 675581 is about 821.9373455441. The cubic root of 675581 is about 87.7456931407.

The spelling of 675581 in words is "six hundred seventy-five thousand, five hundred eighty-one".