671185147 has 2 divisors, whose sum is σ = 671185148. Its totient is φ = 671185146.

The previous prime is 671185139. The next prime is 671185153. The reversal of 671185147 is 741581176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671185147 - 2³ = 671185139 is a prime.

It is not a weakly prime, because it can be changed into another prime (671185117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335592573 + 335592574.

It is an arithmetic number, because the mean of its divisors is an integer number (335592574).

Almost surely, 2^671185147 is an apocalyptic number.

671185147 is a deficient number, since it is larger than the sum of its proper divisors (1).

671185147 is an equidigital number, since it uses as much as digits as its factorization.

671185147 is an evil number, because the sum of its binary digits is even.

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

The square root of 671185147 is about 25907.2412078168. The cubic root of 671185147 is about 875.5496506253.

The spelling of 671185147 in words is "six hundred seventy-one million, one hundred eighty-five thousand, one hundred forty-seven".