671853577 has 2 divisors, whose sum is σ = 671853578. Its totient is φ = 671853576.

The previous prime is 671853571. The next prime is 671853691. The reversal of 671853577 is 775358176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497111616 + 174741961 = 22296^2 + 13219^2 .

It is a cyclic number.

It is not a de Polignac number, because 671853577 - 2⁷ = 671853449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671853577.

It is not a weakly prime, because it can be changed into another prime (671853571) 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, 335926788 + 335926789.

It is an arithmetic number, because the mean of its divisors is an integer number (335926789).

Almost surely, 2^671853577 is an apocalyptic number.

It is an amenable number.

671853577 is a deficient number, since it is larger than the sum of its proper divisors (1).

671853577 is an equidigital number, since it uses as much as digits as its factorization.

671853577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1234800, while the sum is 49.

The square root of 671853577 is about 25920.1384448463. The cubic root of 671853577 is about 875.8402060617.

The spelling of 671853577 in words is "six hundred seventy-one million, eight hundred fifty-three thousand, five hundred seventy-seven".