647362427 has 2 divisors, whose sum is σ = 647362428. Its totient is φ = 647362426.

The previous prime is 647362421. The next prime is 647362481. The reversal of 647362427 is 724263746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647362427 - 2⁸ = 647362171 is a prime.

It is a super-2 number, since 2×647362427² = 838156223782660658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (647362421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323681213 + 323681214.

It is an arithmetic number, because the mean of its divisors is an integer number (323681214).

Almost surely, 2^647362427 is an apocalyptic number.

647362427 is a deficient number, since it is larger than the sum of its proper divisors (1).

647362427 is an equidigital number, since it uses as much as digits as its factorization.

647362427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 41.

The square root of 647362427 is about 25443.3179243588. The cubic root of 647362427 is about 865.0658406007.

The spelling of 647362427 in words is "six hundred forty-seven million, three hundred sixty-two thousand, four hundred twenty-seven".