427716649 has 2 divisors, whose sum is σ = 427716650. Its totient is φ = 427716648.

The previous prime is 427716647. The next prime is 427716659. The reversal of 427716649 is 946617724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265918249 + 161798400 = 16307^2 + 12720^2 .

It is a cyclic number.

It is not a de Polignac number, because 427716649 - 2¹ = 427716647 is a prime.

Together with 427716647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 427716599 and 427716608.

It is not a weakly prime, because it can be changed into another prime (427716647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213858324 + 213858325.

It is an arithmetic number, because the mean of its divisors is an integer number (213858325).

Almost surely, 2^427716649 is an apocalyptic number.

It is an amenable number.

427716649 is a deficient number, since it is larger than the sum of its proper divisors (1).

427716649 is an equidigital number, since it uses as much as digits as its factorization.

427716649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 427716649 is about 20681.3115880014. The cubic root of 427716649 is about 753.4458617286.

The spelling of 427716649 in words is "four hundred twenty-seven million, seven hundred sixteen thousand, six hundred forty-nine".