647546479 has 2 divisors, whose sum is σ = 647546480. Its totient is φ = 647546478.

The previous prime is 647546461. The next prime is 647546513. The reversal of 647546479 is 974645746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647546479 - 2²⁹ = 110675567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647546279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323773239 + 323773240.

It is an arithmetic number, because the mean of its divisors is an integer number (323773240).

Almost surely, 2^647546479 is an apocalyptic number.

647546479 is a deficient number, since it is larger than the sum of its proper divisors (1).

647546479 is an equidigital number, since it uses as much as digits as its factorization.

647546479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 52.

The square root of 647546479 is about 25446.9345698062. The cubic root of 647546479 is about 865.1478152952.

It can be divided in two parts, 647546 and 479, that added together give a square (648025 = 805²).

The spelling of 647546479 in words is "six hundred forty-seven million, five hundred forty-six thousand, four hundred seventy-nine".