649422079 has 2 divisors, whose sum is σ = 649422080. Its totient is φ = 649422078.

The previous prime is 649422073. The next prime is 649422119. The reversal of 649422079 is 970224946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649422079 - 2⁵ = 649422047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649422073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324711039 + 324711040.

It is an arithmetic number, because the mean of its divisors is an integer number (324711040).

Almost surely, 2^649422079 is an apocalyptic number.

649422079 is a deficient number, since it is larger than the sum of its proper divisors (1).

649422079 is an equidigital number, since it uses as much as digits as its factorization.

649422079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 649422079 is about 25483.7610842670. The cubic root of 649422079 is about 865.9823021556.

The spelling of 649422079 in words is "six hundred forty-nine million, four hundred twenty-two thousand, seventy-nine".