675873521 has 2 divisors, whose sum is σ = 675873522. Its totient is φ = 675873520.

The previous prime is 675873511. The next prime is 675873547. The reversal of 675873521 is 125378576.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422713600 + 253159921 = 20560^2 + 15911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675873521 is a prime.

It is not a weakly prime, because it can be changed into another prime (675873511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337936760 + 337936761.

It is an arithmetic number, because the mean of its divisors is an integer number (337936761).

Almost surely, 2^675873521 is an apocalyptic number.

It is an amenable number.

675873521 is a deficient number, since it is larger than the sum of its proper divisors (1).

675873521 is an equidigital number, since it uses as much as digits as its factorization.

675873521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 44.

The square root of 675873521 is about 25997.5675977581. The cubic root of 675873521 is about 877.5835570036.

The spelling of 675873521 in words is "six hundred seventy-five million, eight hundred seventy-three thousand, five hundred twenty-one".