675645349 has 2 divisors, whose sum is σ = 675645350. Its totient is φ = 675645348.

The previous prime is 675645343. The next prime is 675645359. The reversal of 675645349 is 943546576.

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., 408322849 + 267322500 = 20207^2 + 16350^2 .

It is a cyclic number.

It is not a de Polignac number, because 675645349 - 2⁷ = 675645221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675645343) 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, 337822674 + 337822675.

It is an arithmetic number, because the mean of its divisors is an integer number (337822675).

Almost surely, 2^675645349 is an apocalyptic number.

It is an amenable number.

675645349 is a deficient number, since it is larger than the sum of its proper divisors (1).

675645349 is an equidigital number, since it uses as much as digits as its factorization.

675645349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 49.

The square root of 675645349 is about 25993.1788937021. The cubic root of 675645349 is about 877.4847897408.

It can be divided in two parts, 67564534 and 9, that multiplied together give a palindrome (608080806).

The spelling of 675645349 in words is "six hundred seventy-five million, six hundred forty-five thousand, three hundred forty-nine".