675645613 has 2 divisors, whose sum is σ = 675645614. Its totient is φ = 675645612.

The previous prime is 675645599. The next prime is 675645617. The reversal of 675645613 is 316546576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348867684 + 326777929 = 18678^2 + 18077^2 .

It is a cyclic number.

It is not a de Polignac number, because 675645613 - 2¹³ = 675637421 is a prime.

It is a super-2 number, since 2×675645613² = 912993988732291538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 675645613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675645617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337822806 + 337822807.

It is an arithmetic number, because the mean of its divisors is an integer number (337822807).

Almost surely, 2^675645613 is an apocalyptic number.

It is an amenable number.

675645613 is a deficient number, since it is larger than the sum of its proper divisors (1).

675645613 is an equidigital number, since it uses as much as digits as its factorization.

675645613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 43.

The square root of 675645613 is about 25993.1839719570. The cubic root of 675645613 is about 877.4849040295.

The spelling of 675645613 in words is "six hundred seventy-five million, six hundred forty-five thousand, six hundred thirteen".