43820807 has 2 divisors, whose sum is σ = 43820808. Its totient is φ = 43820806.

The previous prime is 43820801. The next prime is 43820809. The reversal of 43820807 is 70802834.

43820807 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 is a cyclic number.

It is not a de Polignac number, because 43820807 - 2¹⁸ = 43558663 is a prime.

It is a super-2 number, since 2×43820807² = 3840526252262498, which contains 22 as substring.

Together with 43820809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43820801) 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, 21910403 + 21910404.

It is an arithmetic number, because the mean of its divisors is an integer number (21910404).

Almost surely, 2^43820807 is an apocalyptic number.

43820807 is a deficient number, since it is larger than the sum of its proper divisors (1).

43820807 is an equidigital number, since it uses as much as digits as its factorization.

43820807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 43820807 is about 6619.7286198152. The cubic root of 43820807 is about 352.5549286500.

The spelling of 43820807 in words is "forty-three million, eight hundred twenty thousand, eight hundred seven".