43864481 has 2 divisors, whose sum is σ = 43864482. Its totient is φ = 43864480.

The previous prime is 43864463. The next prime is 43864511. The reversal of 43864481 is 18446834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 93025 = 6616^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 43864481 - 2⁶ = 43864417 is a prime.

It is a super-2 number, since 2×43864481² = 3848185386798722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43864181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21932240 + 21932241.

It is an arithmetic number, because the mean of its divisors is an integer number (21932241).

Almost surely, 2^43864481 is an apocalyptic number.

It is an amenable number.

43864481 is a deficient number, since it is larger than the sum of its proper divisors (1).

43864481 is an equidigital number, since it uses as much as digits as its factorization.

43864481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 38.

The square root of 43864481 is about 6623.0265740068. The cubic root of 43864481 is about 352.6720143644.

The spelling of 43864481 in words is "forty-three million, eight hundred sixty-four thousand, four hundred eighty-one".