647075071 has 2 divisors, whose sum is σ = 647075072. Its totient is φ = 647075070.

The previous prime is 647075041. The next prime is 647075081. The reversal of 647075071 is 170570746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647075071 - 2²¹ = 644977919 is a prime.

It is a super-2 number, since 2×647075071² = 837412295019310082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 647075071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647075041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323537535 + 323537536.

It is an arithmetic number, because the mean of its divisors is an integer number (323537536).

Almost surely, 2^647075071 is an apocalyptic number.

647075071 is a deficient number, since it is larger than the sum of its proper divisors (1).

647075071 is an equidigital number, since it uses as much as digits as its factorization.

647075071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 647075071 is about 25437.6703139262. The cubic root of 647075071 is about 864.9378243926.

The spelling of 647075071 in words is "six hundred forty-seven million, seventy-five thousand, seventy-one".