647664467 has 2 divisors, whose sum is σ = 647664468. Its totient is φ = 647664466.

The previous prime is 647664449. The next prime is 647664499. The reversal of 647664467 is 764466746.

647664467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647664467 - 2⁶ = 647664403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647664067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323832233 + 323832234.

It is an arithmetic number, because the mean of its divisors is an integer number (323832234).

Almost surely, 2^647664467 is an apocalyptic number.

647664467 is a deficient number, since it is larger than the sum of its proper divisors (1).

647664467 is an equidigital number, since it uses as much as digits as its factorization.

647664467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 50.

The square root of 647664467 is about 25449.2527788145. The cubic root of 647664467 is about 865.2003576555.

The spelling of 647664467 in words is "six hundred forty-seven million, six hundred sixty-four thousand, four hundred sixty-seven".