43370681 has 2 divisors, whose sum is σ = 43370682. Its totient is φ = 43370680.

The previous prime is 43370669. The next prime is 43370683. The reversal of 43370681 is 18607334.

43370681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 12845056 = 5525^2 + 3584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43370681 is a prime.

It is a super-2 number, since 2×43370681² = 3762031940807522, which contains 22 as substring.

Together with 43370683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43370683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21685340 + 21685341.

It is an arithmetic number, because the mean of its divisors is an integer number (21685341).

Almost surely, 2^43370681 is an apocalyptic number.

It is an amenable number.

43370681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43370681 is an equidigital number, since it uses as much as digits as its factorization.

43370681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 43370681 is about 6585.6420340009. The cubic root of 43370681 is about 351.3436271394.

The spelling of 43370681 in words is "forty-three million, three hundred seventy thousand, six hundred eighty-one".