647513143 has 2 divisors, whose sum is σ = 647513144. Its totient is φ = 647513142.

The previous prime is 647513117. The next prime is 647513149. The reversal of 647513143 is 341315746.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647513143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647513099 and 647513108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647513149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323756571 + 323756572.

It is an arithmetic number, because the mean of its divisors is an integer number (323756572).

Almost surely, 2^647513143 is an apocalyptic number.

647513143 is a deficient number, since it is larger than the sum of its proper divisors (1).

647513143 is an equidigital number, since it uses as much as digits as its factorization.

647513143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 647513143 is about 25446.2795512428. The cubic root of 647513143 is about 865.1329689670.

Adding to 647513143 its reverse (341315746), we get a palindrome (988828889).

The spelling of 647513143 in words is "six hundred forty-seven million, five hundred thirteen thousand, one hundred forty-three".