647763049 has 2 divisors, whose sum is σ = 647763050. Its totient is φ = 647763048.

The previous prime is 647763023. The next prime is 647763079. The reversal of 647763049 is 940367746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343435024 + 304328025 = 18532^2 + 17445^2 .

It is a cyclic number.

It is not a de Polignac number, because 647763049 - 2¹³ = 647754857 is a prime.

It is a super-3 number, since 3×647763049³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (647763079) 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, 323881524 + 323881525.

It is an arithmetic number, because the mean of its divisors is an integer number (323881525).

Almost surely, 2^647763049 is an apocalyptic number.

It is an amenable number.

647763049 is a deficient number, since it is larger than the sum of its proper divisors (1).

647763049 is an equidigital number, since it uses as much as digits as its factorization.

647763049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 647763049 is about 25451.1895399802. The cubic root of 647763049 is about 865.2442532521.

The spelling of 647763049 in words is "six hundred forty-seven million, seven hundred sixty-three thousand, forty-nine".