43473649 has 2 divisors, whose sum is σ = 43473650. Its totient is φ = 43473648.

The previous prime is 43473601. The next prime is 43473659. The reversal of 43473649 is 94637434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40233649 + 3240000 = 6343^2 + 1800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43473649 is a prime.

It is not a weakly prime, because it can be changed into another prime (43473659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21736824 + 21736825.

It is an arithmetic number, because the mean of its divisors is an integer number (21736825).

Almost surely, 2^43473649 is an apocalyptic number.

It is an amenable number.

43473649 is a deficient number, since it is larger than the sum of its proper divisors (1).

43473649 is an equidigital number, since it uses as much as digits as its factorization.

43473649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 40.

The square root of 43473649 is about 6593.4550123588. The cubic root of 43473649 is about 351.6214535236.

The spelling of 43473649 in words is "forty-three million, four hundred seventy-three thousand, six hundred forty-nine".