649427 has 2 divisors, whose sum is σ = 649428. Its totient is φ = 649426.

The previous prime is 649423. The next prime is 649457. The reversal of 649427 is 724946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649427 - 2² = 649423 is a prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 649393 and 649402.

It is not a weakly prime, because it can be changed into another prime (649421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324713 + 324714.

It is an arithmetic number, because the mean of its divisors is an integer number (324714).

2⁶⁴⁹⁴²⁷ is an apocalyptic number.

649427 is a deficient number, since it is larger than the sum of its proper divisors (1).

649427 is an equidigital number, since it uses as much as digits as its factorization.

649427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 649427 is about 805.8703369649. The cubic root of 649427 is about 86.5984489479.

The spelling of 649427 in words is "six hundred forty-nine thousand, four hundred twenty-seven".