43882981 has 2 divisors, whose sum is σ = 43882982. Its totient is φ = 43882980.

The previous prime is 43882939. The next prime is 43883009. The reversal of 43882981 is 18928834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23677956 + 20205025 = 4866^2 + 4495^2 .

It is a cyclic number.

It is not a de Polignac number, because 43882981 - 2⁹ = 43882469 is a prime.

It is a super-2 number, since 2×43882981² = 3851432042892722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43882901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21941490 + 21941491.

It is an arithmetic number, because the mean of its divisors is an integer number (21941491).

Almost surely, 2^43882981 is an apocalyptic number.

It is an amenable number.

43882981 is a deficient number, since it is larger than the sum of its proper divisors (1).

43882981 is an equidigital number, since it uses as much as digits as its factorization.

43882981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The square root of 43882981 is about 6624.4230692189. The cubic root of 43882981 is about 352.7215876190.

The spelling of 43882981 in words is "forty-three million, eight hundred eighty-two thousand, nine hundred eighty-one".