649629061 has 2 divisors, whose sum is σ = 649629062. Its totient is φ = 649629060.

The previous prime is 649629037. The next prime is 649629083. The reversal of 649629061 is 160926946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 586124100 + 63504961 = 24210^2 + 7969^2 .

It is a cyclic number.

It is not a de Polignac number, because 649629061 - 2¹³ = 649620869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649628999 and 649629017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649629011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324814530 + 324814531.

It is an arithmetic number, because the mean of its divisors is an integer number (324814531).

Almost surely, 2^649629061 is an apocalyptic number.

It is an amenable number.

649629061 is a deficient number, since it is larger than the sum of its proper divisors (1).

649629061 is an equidigital number, since it uses as much as digits as its factorization.

649629061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 649629061 is about 25487.8218174877. The cubic root of 649629061 is about 866.0742935407.

The spelling of 649629061 in words is "six hundred forty-nine million, six hundred twenty-nine thousand, sixty-one".