647118859 has 2 divisors, whose sum is σ = 647118860. Its totient is φ = 647118858.

The previous prime is 647118841. The next prime is 647118877. The reversal of 647118859 is 958811746.

It is a balanced prime because it is at equal distance from previous prime (647118841) and next prime (647118877).

It is a cyclic number.

It is not a de Polignac number, because 647118859 - 2⁵ = 647118827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647118839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323559429 + 323559430.

It is an arithmetic number, because the mean of its divisors is an integer number (323559430).

Almost surely, 2^647118859 is an apocalyptic number.

647118859 is a deficient number, since it is larger than the sum of its proper divisors (1).

647118859 is an equidigital number, since it uses as much as digits as its factorization.

647118859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 647118859 is about 25438.5309913918. The cubic root of 647118859 is about 864.9573342583.

The spelling of 647118859 in words is "six hundred forty-seven million, one hundred eighteen thousand, eight hundred fifty-nine".