646130071 has 2 divisors, whose sum is σ = 646130072. Its totient is φ = 646130070.

The previous prime is 646130059. The next prime is 646130077. The reversal of 646130071 is 170031646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646130071 - 2⁵ = 646130039 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646130077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323065035 + 323065036.

It is an arithmetic number, because the mean of its divisors is an integer number (323065036).

Almost surely, 2^646130071 is an apocalyptic number.

646130071 is a deficient number, since it is larger than the sum of its proper divisors (1).

646130071 is an equidigital number, since it uses as much as digits as its factorization.

646130071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 646130071 is about 25419.0887130125. The cubic root of 646130071 is about 864.5165623667.

The spelling of 646130071 in words is "six hundred forty-six million, one hundred thirty thousand, seventy-one".