649516069 has 2 divisors, whose sum is σ = 649516070. Its totient is φ = 649516068.

The previous prime is 649516057. The next prime is 649516099. The reversal of 649516069 is 960615946.

649516069 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., 531533025 + 117983044 = 23055^2 + 10862^2 .

It is a cyclic number.

It is not a de Polignac number, because 649516069 - 2⁷ = 649515941 is a prime.

It is a super-2 number, since 2×649516069² = 843742247778425522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649516009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324758034 + 324758035.

It is an arithmetic number, because the mean of its divisors is an integer number (324758035).

Almost surely, 2^649516069 is an apocalyptic number.

It is an amenable number.

649516069 is a deficient number, since it is larger than the sum of its proper divisors (1).

649516069 is an equidigital number, since it uses as much as digits as its factorization.

649516069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 649516069 is about 25485.6051330943. The cubic root of 649516069 is about 866.0240776320.

The spelling of 649516069 in words is "six hundred forty-nine million, five hundred sixteen thousand, sixty-nine".