647362481 has 2 divisors, whose sum is σ = 647362482. Its totient is φ = 647362480.

The previous prime is 647362427. The next prime is 647362483. The reversal of 647362481 is 184263746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494617600 + 152744881 = 22240^2 + 12359^2 .

It is a cyclic number.

It is not a de Polignac number, because 647362481 - 2¹⁴ = 647346097 is a prime.

It is a super-2 number, since 2×647362481² = 838156363612950722, which contains 22 as substring.

Together with 647362483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647362483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323681240 + 323681241.

It is an arithmetic number, because the mean of its divisors is an integer number (323681241).

Almost surely, 2^647362481 is an apocalyptic number.

It is an amenable number.

647362481 is a deficient number, since it is larger than the sum of its proper divisors (1).

647362481 is an equidigital number, since it uses as much as digits as its factorization.

647362481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The square root of 647362481 is about 25443.3189855412. The cubic root of 647362481 is about 865.0658646540.

The spelling of 647362481 in words is "six hundred forty-seven million, three hundred sixty-two thousand, four hundred eighty-one".