647461699 has 2 divisors, whose sum is σ = 647461700. Its totient is φ = 647461698.

The previous prime is 647461697. The next prime is 647461723. The reversal of 647461699 is 996164746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647461699 - 2¹ = 647461697 is a prime.

Together with 647461697, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (647461697) 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, 323730849 + 323730850.

It is an arithmetic number, because the mean of its divisors is an integer number (323730850).

Almost surely, 2^647461699 is an apocalyptic number.

647461699 is a deficient number, since it is larger than the sum of its proper divisors (1).

647461699 is an equidigital number, since it uses as much as digits as its factorization.

647461699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 52.

The square root of 647461699 is about 25445.2686957713. The cubic root of 647461699 is about 865.1100571649.

The spelling of 647461699 in words is "six hundred forty-seven million, four hundred sixty-one thousand, six hundred ninety-nine".