649867301 has 2 divisors, whose sum is σ = 649867302. Its totient is φ = 649867300.

The previous prime is 649867259. The next prime is 649867303. The reversal of 649867301 is 103768946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572884225 + 76983076 = 23935^2 + 8774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649867301 is a prime.

It is a Sophie Germain prime.

Together with 649867303, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649867303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324933650 + 324933651.

It is an arithmetic number, because the mean of its divisors is an integer number (324933651).

Almost surely, 2^649867301 is an apocalyptic number.

It is an amenable number.

649867301 is a deficient number, since it is larger than the sum of its proper divisors (1).

649867301 is an equidigital number, since it uses as much as digits as its factorization.

649867301 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 44.

The square root of 649867301 is about 25492.4949936251. The cubic root of 649867301 is about 866.1801530915.

The spelling of 649867301 in words is "six hundred forty-nine million, eight hundred sixty-seven thousand, three hundred one".