649066441 has 2 divisors, whose sum is σ = 649066442. Its totient is φ = 649066440.

The previous prime is 649066427. The next prime is 649066471. The reversal of 649066441 is 144660946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362102841 + 286963600 = 19029^2 + 16940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649066441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649066394 and 649066403.

It is not a weakly prime, because it can be changed into another prime (649066421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324533220 + 324533221.

It is an arithmetic number, because the mean of its divisors is an integer number (324533221).

Almost surely, 2^649066441 is an apocalyptic number.

It is an amenable number.

649066441 is a deficient number, since it is larger than the sum of its proper divisors (1).

649066441 is an equidigital number, since it uses as much as digits as its factorization.

649066441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 649066441 is about 25476.7823910320. The cubic root of 649066441 is about 865.8241962236.

The spelling of 649066441 in words is "six hundred forty-nine million, sixty-six thousand, four hundred forty-one".