671418479 has 2 divisors, whose sum is σ = 671418480. Its totient is φ = 671418478.

The previous prime is 671418463. The next prime is 671418481. The reversal of 671418479 is 974814176.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671418479 - 2⁴ = 671418463 is a prime.

It is a Sophie Germain prime.

Together with 671418481, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671418499) 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, 335709239 + 335709240.

It is an arithmetic number, because the mean of its divisors is an integer number (335709240).

Almost surely, 2^671418479 is an apocalyptic number.

671418479 is a deficient number, since it is larger than the sum of its proper divisors (1).

671418479 is an equidigital number, since it uses as much as digits as its factorization.

671418479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 671418479 is about 25911.7440362473. The cubic root of 671418479 is about 875.6510980837.

The spelling of 671418479 in words is "six hundred seventy-one million, four hundred eighteen thousand, four hundred seventy-nine".