647433487 has 2 divisors, whose sum is σ = 647433488. Its totient is φ = 647433486.

The previous prime is 647433469. The next prime is 647433517. The reversal of 647433487 is 784334746.

647433487 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 a de Polignac number, because none of the positive numbers 2^k-647433487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647433467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323716743 + 323716744.

It is an arithmetic number, because the mean of its divisors is an integer number (323716744).

Almost surely, 2^647433487 is an apocalyptic number.

647433487 is a deficient number, since it is larger than the sum of its proper divisors (1).

647433487 is an equidigital number, since it uses as much as digits as its factorization.

647433487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 46.

The square root of 647433487 is about 25444.7143234111. The cubic root of 647433487 is about 865.0974917681.

The spelling of 647433487 in words is "six hundred forty-seven million, four hundred thirty-three thousand, four hundred eighty-seven".