671074409 has 2 divisors, whose sum is σ = 671074410. Its totient is φ = 671074408.

The previous prime is 671074379. The next prime is 671074447. The reversal of 671074409 is 904470176.

It is an a-pointer prime, because the next prime (671074447) can be obtained adding 671074409 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531763600 + 139310809 = 23060^2 + 11803^2 .

It is a cyclic number.

It is not a de Polignac number, because 671074409 - 2¹² = 671070313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671074109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335537204 + 335537205.

It is an arithmetic number, because the mean of its divisors is an integer number (335537205).

Almost surely, 2^671074409 is an apocalyptic number.

It is an amenable number.

671074409 is a deficient number, since it is larger than the sum of its proper divisors (1).

671074409 is an equidigital number, since it uses as much as digits as its factorization.

671074409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 671074409 is about 25905.1039179541. The cubic root of 671074409 is about 875.5014960287.

The spelling of 671074409 in words is "six hundred seventy-one million, seventy-four thousand, four hundred nine".