649612969 has 2 divisors, whose sum is σ = 649612970. Its totient is φ = 649612968.

The previous prime is 649612961. The next prime is 649613011. The reversal of 649612969 is 969216946.

649612969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406627225 + 242985744 = 20165^2 + 15588^2 .

It is a cyclic number.

It is not a de Polignac number, because 649612969 - 2³ = 649612961 is a prime.

It is a super-2 number, since 2×649612969² = 843994018985989922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (649612961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324806484 + 324806485.

It is an arithmetic number, because the mean of its divisors is an integer number (324806485).

Almost surely, 2^649612969 is an apocalyptic number.

It is an amenable number.

649612969 is a deficient number, since it is larger than the sum of its proper divisors (1).

649612969 is an equidigital number, since it uses as much as digits as its factorization.

649612969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 52.

The square root of 649612969 is about 25487.5061353597. The cubic root of 649612969 is about 866.0671422891.

The spelling of 649612969 in words is "six hundred forty-nine million, six hundred twelve thousand, nine hundred sixty-nine".