43826681 has 2 divisors, whose sum is σ = 43826682. Its totient is φ = 43826680.

The previous prime is 43826659. The next prime is 43826729. The reversal of 43826681 is 18662834.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 55225 = 6616^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 43826681 - 2⁶ = 43826617 is a prime.

It is a super-2 number, since 2×43826681² = 3841555934951522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43826621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21913340 + 21913341.

It is an arithmetic number, because the mean of its divisors is an integer number (21913341).

Almost surely, 2^43826681 is an apocalyptic number.

It is an amenable number.

43826681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43826681 is an equidigital number, since it uses as much as digits as its factorization.

43826681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 43826681 is about 6620.1722787251. The cubic root of 43826681 is about 352.5706807950.

The spelling of 43826681 in words is "forty-three million, eight hundred twenty-six thousand, six hundred eighty-one".