671178413 has 2 divisors, whose sum is σ = 671178414. Its totient is φ = 671178412.

The previous prime is 671178371. The next prime is 671178449. The reversal of 671178413 is 314871176.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443228809 + 227949604 = 21053^2 + 15098^2 .

It is a cyclic number.

It is not a de Polignac number, because 671178413 - 2¹⁰ = 671177389 is a prime.

It is equal to p_34836455 and since 671178413 and 34836455 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671108413) 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, 335589206 + 335589207.

It is an arithmetic number, because the mean of its divisors is an integer number (335589207).

Almost surely, 2^671178413 is an apocalyptic number.

It is an amenable number.

671178413 is a deficient number, since it is larger than the sum of its proper divisors (1).

671178413 is an equidigital number, since it uses as much as digits as its factorization.

671178413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 671178413 is about 25907.1112438265. Note that the first 3 decimals coincide. The cubic root of 671178413 is about 875.5467224859.

The spelling of 671178413 in words is "six hundred seventy-one million, one hundred seventy-eight thousand, four hundred thirteen".