671178451 has 2 divisors, whose sum is σ = 671178452. Its totient is φ = 671178450.

The previous prime is 671178449. The next prime is 671178457. The reversal of 671178451 is 154871176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671178451 - 2¹ = 671178449 is a prime.

Together with 671178449, it forms a pair of twin primes.

It is equal to p_34836457 and since 671178451 and 34836457 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (671178457) 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, 335589225 + 335589226.

It is an arithmetic number, because the mean of its divisors is an integer number (335589226).

Almost surely, 2^671178451 is an apocalyptic number.

671178451 is a deficient number, since it is larger than the sum of its proper divisors (1).

671178451 is an equidigital number, since it uses as much as digits as its factorization.

671178451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 40.

The square root of 671178451 is about 25907.1119772158. Note that the first 3 decimals coincide. The cubic root of 671178451 is about 875.5467390094.

The spelling of 671178451 in words is "six hundred seventy-one million, one hundred seventy-eight thousand, four hundred fifty-one".