649426201 has 2 divisors, whose sum is σ = 649426202. Its totient is φ = 649426200.

The previous prime is 649426199. The next prime is 649426241. The reversal of 649426201 is 102624946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359064601 + 290361600 = 18949^2 + 17040^2 .

It is a cyclic number.

It is not a de Polignac number, because 649426201 - 2¹ = 649426199 is a prime.

Together with 649426199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (649426241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324713100 + 324713101.

It is an arithmetic number, because the mean of its divisors is an integer number (324713101).

Almost surely, 2^649426201 is an apocalyptic number.

It is an amenable number.

649426201 is a deficient number, since it is larger than the sum of its proper divisors (1).

649426201 is an equidigital number, since it uses as much as digits as its factorization.

649426201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 649426201 is about 25483.8419591709. The cubic root of 649426201 is about 865.9841343341.

The spelling of 649426201 in words is "six hundred forty-nine million, four hundred twenty-six thousand, two hundred one".