671055379 has 2 divisors, whose sum is σ = 671055380. Its totient is φ = 671055378.

The previous prime is 671055361. The next prime is 671055457. The reversal of 671055379 is 973550176.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671055379 is a prime.

It is not a weakly prime, because it can be changed into another prime (671055179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335527689 + 335527690.

It is an arithmetic number, because the mean of its divisors is an integer number (335527690).

Almost surely, 2^671055379 is an apocalyptic number.

671055379 is a deficient number, since it is larger than the sum of its proper divisors (1).

671055379 is an equidigital number, since it uses as much as digits as its factorization.

671055379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 671055379 is about 25904.7366132142. The cubic root of 671055379 is about 875.4932202693.

The spelling of 671055379 in words is "six hundred seventy-one million, fifty-five thousand, three hundred seventy-nine".