40646449 has 2 divisors, whose sum is σ = 40646450. Its totient is φ = 40646448.

The previous prime is 40646447. The next prime is 40646467. The reversal of 40646449 is 94464604.

40646449 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., 37601424 + 3045025 = 6132^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 40646449 - 2¹ = 40646447 is a prime.

Together with 40646447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40646443) 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, 20323224 + 20323225.

It is an arithmetic number, because the mean of its divisors is an integer number (20323225).

Almost surely, 2^40646449 is an apocalyptic number.

It is an amenable number.

40646449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40646449 is an equidigital number, since it uses as much as digits as its factorization.

40646449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 40646449 is about 6375.4567679500. The cubic root of 40646449 is about 343.8277063336.

The spelling of 40646449 in words is "forty million, six hundred forty-six thousand, four hundred forty-nine".