649418401 has 2 divisors, whose sum is σ = 649418402. Its totient is φ = 649418400.

The previous prime is 649418387. The next prime is 649418447. The reversal of 649418401 is 104814946.

649418401 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., 364619025 + 284799376 = 19095^2 + 16876^2 .

It is a cyclic number.

It is not a de Polignac number, because 649418401 - 2¹⁷ = 649287329 is a prime.

It is not a weakly prime, because it can be changed into another prime (649418701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324709200 + 324709201.

It is an arithmetic number, because the mean of its divisors is an integer number (324709201).

Almost surely, 2^649418401 is an apocalyptic number.

It is an amenable number.

649418401 is a deficient number, since it is larger than the sum of its proper divisors (1).

649418401 is an equidigital number, since it uses as much as digits as its factorization.

649418401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 649418401 is about 25483.6889205625. The cubic root of 649418401 is about 865.9806673231.

The spelling of 649418401 in words is "six hundred forty-nine million, four hundred eighteen thousand, four hundred one".