43949473 has 2 divisors, whose sum is σ = 43949474. Its totient is φ = 43949472.

The previous prime is 43949461. The next prime is 43949533. The reversal of 43949473 is 37494934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40666129 + 3283344 = 6377^2 + 1812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43949473 is a prime.

It is not a weakly prime, because it can be changed into another prime (43949273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21974736 + 21974737.

It is an arithmetic number, because the mean of its divisors is an integer number (21974737).

Almost surely, 2^43949473 is an apocalyptic number.

It is an amenable number.

43949473 is a deficient number, since it is larger than the sum of its proper divisors (1).

43949473 is an equidigital number, since it uses as much as digits as its factorization.

43949473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 43949473 is about 6629.4398707583. The cubic root of 43949473 is about 352.8996469921.

The spelling of 43949473 in words is "forty-three million, nine hundred forty-nine thousand, four hundred seventy-three".