649910537 has 2 divisors, whose sum is σ = 649910538. Its totient is φ = 649910536.

The previous prime is 649910489. The next prime is 649910603. The reversal of 649910537 is 735019946.

649910537 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., 598487296 + 51423241 = 24464^2 + 7171^2 .

It is a cyclic number.

It is not a de Polignac number, because 649910537 - 2²⁴ = 633133321 is a prime.

It is a super-2 number, since 2×649910537² = 844767412207256738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649910237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324955268 + 324955269.

It is an arithmetic number, because the mean of its divisors is an integer number (324955269).

Almost surely, 2^649910537 is an apocalyptic number.

It is an amenable number.

649910537 is a deficient number, since it is larger than the sum of its proper divisors (1).

649910537 is an equidigital number, since it uses as much as digits as its factorization.

649910537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 649910537 is about 25493.3429938092. The cubic root of 649910537 is about 866.1993618000.

The spelling of 649910537 in words is "six hundred forty-nine million, nine hundred ten thousand, five hundred thirty-seven".